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INSTRUCTION MANUAL

HF TRANSCEIVER

i78

This device complies with Part 15 of the FCC rules. Operation is sub-

ject to the following two conditions: (1) This device may not cause

harmful interference, and (2) this device must accept any interference

received, including interference that may cause undesired operation.

IMPORTANT

READ THIS INSTRUCTION MANUAL

CAREFULLY before attempting to operate the

transceiver.

SAVE THIS INSTRUCTION MANUAL. This

manual contains important safety and operating in-

structions for the IC-78.

EXPLICIT DEFINITIONS

PRECAUTIONS

R WARNING HIGH VOLTAGE! NEVER at-

tach an antenna or internal antenna connector during

transmission. This may result in an electric shock or

burn.

R NEVER apply AC to the [DC13.8V] jack on the

transceiver rear panel. This could cause a ﬁre or ruin

the transceiver.

R NEVER apply more than 16 V DC, such as a 24 V

battery, to the [DC13.8V] jack on the transceiver rear

panel. This could cause a ﬁre or ruin the transceiver.

R NEVER let metal, wire or other objects touch any

internal part or connectors on the rear panel of the

transceiver. This may result in an electric shock.

NEVER expose the transceiver to rain, snow or any

liquids.

AVOID using or placing the transceiver in areas with

temperatures below –10°C (+14°F) or above +60°C

(+140°F). Be aware that temperatures on a vehicle’s

dashboard can exceed 80°C (+176°F), resulting in per-

manent damage to the transceiver if left there for ex-

tended periods.

AVOID placing the transceiver in excessively dusty en-

vironments or in direct sunlight.

AVOID placing the transceiver against walls or putting

anything on top of the transceiver. This will obstruct

heat dissipation.

During mobile operation, DO NOT operate the trans-

ceiver without running the vehicle’s engine. When the

transceiver power is ON and your vehicle’s engine is

OFF, the vehicle’s battery will soon become ex-

hausted.

Make sure the transceiver power is OFF before start-

ing the vehicle. This will avoid possible damage to the

transceiver by ignition voltage spikes.

During maritime mobile operation, keep the transceiver

and microphone as far away as possible from the mag-

netic navigation compass to prevent erroneous indica-

tions.

BE CAREFUL! The heatsink will become hot when op-

erating the transceiver continuously for long periods.

BE CAREFUL! If a linear amplifier is connected, set

the transceiver’s RF output power to less than the lin-

ear ampliﬁer’s maximum input level, otherwise, the lin-

ear ampliﬁer will be damaged.

Use Icom microphones only (supplied or optional).

Other manufacturer’s microphones have different pin

assignments, and connection to the IC-78 may dam-

age the transceiver.

WORD DEFINITION

R WARNING

Personal injury, ﬁre hazard or electric

shock may occur.

CAUTION Equipment damage may occur.

NOTE

Inconvenience only. No risk of per of

personal injury, ﬁre or electric shock.

TABLE OF CONTENTS

IMPORTANT .............................................................. i

EXPLICIT DEFINITIONS ........................................... i

PRECAUTIONS ........................................................ i

1 TABLE OF CONTENTS ....................................... 1

SUPPLIED ACCESSORIES ..................................... 1

2 PANEL DESCRIPTION ................................... 2–7

■ Front panel ....................................................... 2

■ Function display ............................................... 4

■ Rear panel ........................................................ 5

■ Microphone (HM-36) ........................................ 7

3 INSTALLATION AND CONNECTIONS ......... 8–12

■ Unpacking ........................................................ 8

■ Selecting a location .......................................... 8

■ Grounding ......................................................... 8

■ Antenna connection .......................................... 8

■ Required connections ....................................... 9

■ Power supply connections .............................. 10

■ Advanced connections .................................... 11

■ External antenna tuners ................................. 12

4 OPERATION................................................. 13–27

■ Selecting a channel......................................... 13

■ Frequency indication ....................................... 14

■ Lock function................................................... 14

■ Scan function................................................... 14

■ Basic voice receive and transmit..................... 15

■ Mode selection................................................ 15

■ RF gain and Squelch....................................... 15

■ Functions for transmit...................................... 16

■ Functions for receive....................................... 19

■ Filter selection ................................................. 21

■ Filter setting..................................................... 22

■ Functions for CW............................................. 23

■ Functions for RTTY ......................................... 25

■ Channel comment programming..................... 27

5 SET MODE ................................................... 28–33

■ General............................................................ 28

■ Quick set mode items...................................... 29

■ Initial set mode items....................................... 31

6 EXTRA FEATURES...................................... 34–36

■ Instruction........................................................ 34

■ VFO operation................................................. 34

■ 2-Tone alarm operation ................................... 36

7 INSTALLATION AND CONNECTIONS ........ 37–38

■ Opening the transceiver’s case ...................... 37

■ Optional bracket and carrying handle.............. 37

■ CR-338 HIGH STABILITY CRYSTAL UNIT ......... 38

■ Optional IF ﬁlters ............................................ 38

8 MAINTENANCE ........................................... 39–40

■ Troubleshooting .............................................. 39

■ Fuse replacement ........................................... 40

■ Resetting the CPU .......................................... 40

9 REMOTE JACK INFORMATION.................. 41–42

■ CI-V remote control ......................................... 41

■ Data cloning between transceivers ................. 42

10 SPECIFICATIONS ........................................... 43

12 OPTIONS .................................................. 44–45

SUPPLIED ACCESSORIES

The transceiver comes with the following accessories.

Qty.

q DC power cable.................................................... 1

w Hand microphone (HM-36) .................................. 1

e Fuse (FGB 20 A; for DC cable) ............................ 1

r Fuse (FGB 4 A; internal use) ............................... 1

■ Front panel

q POWER SWITCH [PWR]

➥Push momentarily to turn power ON.

•Turn the optional DC power supply ON in advance.

➥Push for 1 sec. to turn power OFF.

➥While pushing and holding [SET], push [PWR] to

enter the

initial set mode

. (p. 28)

w MICROPHONE CONNECTOR [MIC]

Accepts supplied or optional microphone.

•See p. 45 for appropriate microphones.

• See p. 7 for microphone connector information.

e HEADPHONE JACK [PHONES] (p. 11)

Accepts headphones.

•When headphones are connected, the internal

speaker or connected external speaker does not

function.

r AF CONTROL [AF] (inner control)

Varies the audio output level from the speaker.

t RF GAIN/SQUELCH CONTROL [RF/SQL]

(outer control; pgs. 15, 31)

Adjusts the squelch threshold level. The squelch re-

moves noise output from the speaker (closed con-

dition) when no signal is received.

•The squelch is available for all modes.

•The control can be set as the squelch plus RF gain

controls or squelch control only (RF gain is ﬁxed at

maximum) in initial set mode.

y RIT CONTROL [RIT] (inner control; p. 19)

➥Shifts the receive frequency ±1.2 kHz for clear re-

ception of an off frequency signal.

•Rotate the control clockwise to increase the fre-

quency, or rotate the control counterclockwise to

decrease the frequency. “ ” appears on the

display.

u IF SHIFT CONTROLS [SHIFT]

(outer control; p. 20)

Shifts the center frequency of the receiver’s IF

passband.

•Rotate the control clockwise to shift the center fre-

quency higher, or rotate the control counterclock-

wise to shift the center frequency lower.

i LOCK SWITCH [LOCK] (p. 14)

Push momentarily to turn the dial lock function ON

and OFF.

• The dial lock function electronically locks the chan-

nel selector.

o CHANNEL SELECTOR

Selects an operating channel, sets conditions in the

quick/initial set mode items, etc.

!0 PREAMP SWITCH [P.AMP] (p. 19)

Push to turn the preamp ON or OFF.

!1 FC SWITCH [CH]

➥Push to change the indication, channel comment

or stored frequency. (p. 14)

☛This key action only for some versions.

➥

Push for 1 sec. to entering into VFO mode. (p. 35)

!2 MEMORY CHANNEL UP/DOWN SWITCHES

[√ DN]/[UP ∫]

➥Push to select the operating channel. (p. 13)

➥Push for 1 sec. to start scanning. (p. 14)

➥Push to select the

quick/initial set mode

items

while

quick/initial set mode

is selected. (p. 28)

➥Push to select the digit of channel comment while

editing. (p. 27)

PANEL DESCRIPTION

PWR

Speaker

Function Display

@1 @0 !9

iuytre

PANEL DESCRIPTION

!3 ATTENUATOR SWITCH [ATT] (p. 19)

Push to turn the 20 dB attenuator function ON and

OFF.

!4 TUNER SWITCH [TUNER] (p. 18)

➥Push to turn the antenna tuner function ON and

OFF.

➥Push for 1 sec. to manually tune the tuner.

• An optional antenna tuner must be connected.

• When the tuner cannot tune the antenna, the tun-

ing circuit is bypassed automatically after 20 sec.

!5 SET SWITCH [SET]

➥Push for 1 sec. to enter the

quick set mode

(p. 28)

➥Push and hold [SET], then push [PWR] to enter

the

initial set mode

. (p. 28)

➥Push to change the meter function; (p. 16)

•PO: indicates the relative RF output power.

•ALC: Indicates ALC level.

•SWR: Indicates the SWR over the transmission

line.

!6 MIC COMPRESSOR SWITCH [COMP] (p. 17)

Turn the Mic. compressor function ON and OFF.

!7 KEYPAD

The keypad can be used for several functions as

described below:

➥[0] to [9]

— For entering operating channel number. (p. 13)

— Selects a character during channel comment

programming. (p. 27)

➥[ENT]

— Direct channel number input. (p. 13)

➥[TXF]

— Transmit frequency indication. (p.14)

— Selects a space and changes the editing digit

during channel comment programming. (p. 27)

!8 NOISE BLANKER SWITCH [NB] (p. 19)

➥Turns the noise blanker ON and OFF. The noise

blanker reduces pulse-type noise such as that

generated by automobile ignition systems. This

function is not effective against non pulse-type

noise.

➥Push [NB] for 1 sec. to enter the noise blanker

level setting condition.

!9 TONE SWITCH [TONE]

☛

This key action may differ according to version.

➥Selects the call channel and emits a distress

alarm tone from the speaker. (p. 36)

➥Transmits a distress alarm or alarm testing signal

when pushed for 1 sec. (p. 36)

•Cancel the distress alarm tone emission, or dis-

tress alarm transmission.

➥Selects the tuning step item in the

quick set mode

directly.

➥No function is assigned.

@0 CALL SWITCH [CALL]

➥Push to select call channel.

•Push again to return to previous condition.

@1 MODE SWITCH [MODE] (p. 15)

Push to change an operating mode.

•Push [MODE] for 1 sec. during SSB mode to

switch between LSB or USB.

•Push [MODE] for 1 sec. during CW or RTTY

mode, to switch between CW and CW reverse or

RTTY and RTTY reverse. “ ” appears on the

display.

PANEL DESCRIPTION

■ Function display

q LOCK INDICATOR (p. 14)

Appears when the dial lock function is in use.

w RECEIVE INDICATOR

Appears while receiving a signal or when the

squelch is open.

e TUNE INDICATOR

➥Appears or disappears when the connected au-

tomatic tuner is tuned completely, depending on

connected antenna tuner type.

➥Flashes while tuning.

r TRANSMIT INDICATOR

➥Appears while transmitting.

➥Flashes while transmit frequency is indicated.

t ALARM INDICATOR

☛This indicator appears only some versions.

Appears while 2-tone alarm is emitting or transmit-

ting

y FUNCTION INDICATORS

➥“P.AMP” appears when preamp is activated.

➥“ATT” appears when the RF attenuator is acti-

vated.

➥“NB” appears when the Noise Blanker is acti-

vated.

➥“BK” appears when the semi break-in function is

selected in

quick set mode

➥“F-BK” appears when the full break-in function

activates in CW mode. (p. 23)

➥“VOX” appears when the VOX function is se-

lected in

quick set mode

➥“COM” appears when the speech compressor ac-

tivates in SSB mode.

➥“SCAN” appears during scanning.

•Flashes when scan is paused.

u SIGNAL/SQL/RF-GAIN METER

➥Functions as an S-meter while receiving.

➥Functions as a Power, ALC or SWR meter while

transmitting. (p. 16)

i VFO/MEMORY INDICATOR

➥“MEMO” appears during regular operation.

☛This indicator appears only some versions.

➥“VFO” appears during VFO operation.

o CHANNEL NUMBER READOUT (p. 13)

Shows the selected channel number.

!0 BLANK INDICATOR

Appears when no frequency programmed channel

is selected.

!1 SPLIT INDICATORS (p. 13)

Appears when the duplex channel, in which differ-

ent frequencies between transmit and receive are

programmed, is selected.

!2 RIT INDICATOR (p. 19)

Appears when the RIT function is in use.

!3 CHANNEL READOUT

Shows the memory names, or stored frequency of

the selected channel.

!4 REVERSE INDICATOR (p. 15)

Appears when the CW reverse or RTTY reverse

mode is selected.

!5 WIDE/NARROW FILTER INDICATORS (pgs. 21, 22)

➥“ ” appears when the wide IF ﬁlter is selected.

➥“ ” appears when the narrow IF filter is se-

lected.

!6 MODE INDICATORS (p. 15)

Indicates the temporarily selected operating mode.

!6 !4

PANEL DESCRIPTION

■ Rear panel

q ANTENNA TERMINAL [ANT] (p. 9)

Connects a 50 Ω antenna with a PL-259 connector

and a 50 Ω coaxial cable.

w DC POWER SOCKET [DC 13.8V] (p. 10)

Accepts 13.8 V DC through the supplied DC power

cable.

e TUNER CONTROL SOCKET [TUNER] (p. 11)

Accepts the control cable from an optional antenna

tuner.

r REMOTE JACK [REMOTE] (p. 11)

For use with a personal computer for remote opera-

tion of transceiver functions, and data cloning be-

tween transceivers.

t EXTERNAL SPEAKER JACK [EXT SP]

Connects an 8 Ω external speaker, if desired.

•When an external speaker is connected, the inter-

nal speaker does not function.

y ACCESSORY SOCKET [ACC] (p. 6)

Enables connection to external equipment such as

a TNC for data communications or a linear ampli-

ﬁer, etc.

u ELECTRONIC KEYER JACK [KEY]

Accepts a paddle to activate the internal electronic

keyer.

•Selection between the internal electronic keyer

and straight key operation can be made in initial

set mode.

i ALC INPUT JACK [ALC]

Connects to the ALC output jack of a non-Icom lin-

ear ampliﬁer.

o SEND CONTROL JACK [SEND]

Goes to ground while transmitting to control exter-

nal equipment such as a linear ampliﬁer.

• Max. control level: 16 V DC/2 A

!0 GROUND TERMINAL [GND] (p. 9)

Connects the terminal to ground.

qwe

rtyuio!0

Rear panel view

When connecting

a straight key

When connecting

a paddle

(dot)

(com)

(dash)

(⊕)

PANEL DESCRIPTION

ACC SOCKET INFORMATION

• ACC socket

•When connecting the ACC conversion cable (OPC-599)

ACC PIN # NAME DESCRIPTION SPECIFICATIONS

ACC 1

ACC 2

➀ FSKK ➄ AF

➁ GND ➅ SQLS

➂ SEND ➆ 13.8 V

➃ MOD ➇ ALC

➀ 8 V ➄ ALC

➁ GND ➅ NC

➂ SEND ➆ 13.8 V

➃ BAND

10 11 12

Rear panel

view

1234

8765

10 11 12

1 8 V Regulated 8 V output.

Output voltage : 8 V ±0.3 V

Output current : Less than 10 mA

2 GND Connects to ground. —

Input/output pin.

Ground level : –0.5 V to 0.8 V

3 SEND Goes to ground when transmitting.

Input current : Less than 20 mA

When grounded, transmits.

4 BDT Data line. —

5 BAND Band voltage output.

6 ALC ALC voltage output.

Control voltage : –4 V to 0 V

Input impedance

: More than 10 kΩ

7NC — — —

13.8 V

13.8 V output when power is ON. Output current : Max. 1 A

9 TKEY Key line. —

10 FSKK RTTY key input.

Ground level : –0.5 V to 0.8 V

Input current : Less than 10 mA

11 MOD Modulation input.

Input impedance

: 10 kΩ

Input level : Approx. 100 mV rms

12 AF

AF detector output.

Output impedance

: 4.7 kΩ

Fixed, regardless of [AF] position. Output level : 100–300 mV rms

13 SQLS

Squelch output. SQL open : Less than 0.3 V/5 mA

Goes to ground when squelch opens.

SQL closed :

More than 6.0 V/100 µA

PANEL DESCRIPTION

■ Microphone (HM-36)

•DESCRIPTION

q UP/DOWN SWITCHES [UP]/[DN]

Change the selected readout frequency or memory

channel.

•Continuous pushing changes the frequency or

memory channel number continuously.

•The [UP]/[DN] switch can simulate a key paddle.

Preset in the CW PADDL in initial set mode. (p. 32)

w PTT SWITCH

Push and hold to transmit; release to receive.

•MICROPHONE CONNECTOR

(Front view)

CAUTION: DO NOT short pin 2 to ground as this

can damage the internal 8 V regulator.

y GND (PTT ground)

t PTT

r Main readout squelch switch

q Microphone input

w +8 V DC output

e Frequency up/down

u GND

(Microphone ground)

i Main readout AF output

(varies with [AF])

•HM-36 SCHEMATIC DIAGRAM

4700 p

10 µ

0.33 µ

MICROPHONE

MIC

ELEMENT

2 k

470

DOWN UP

PTT

RECEIVE

TRANSMIT

MICROPHONE CABLE MICROPHONE PLUG

[MIC]

FUNCTION DESCRIPTION

Pin No.

w +8 V DC output Max. 10 mA

Frequency up Ground

Frequency down Ground through 470 Ω

Squelch open “Low” level

Squelch closed “High” level

INSTALLATION AND CONNECTIONS

■ Antenna connection

For radio communications, the antenna is of critical impor-

tance, along with output power and sensitivity. Select an-

tenna(s), such as a well-matched 50 Ω antenna, and feed

line. 1.5:1 or better of Voltage Standing Wave Ratio (VSWR)

is recommended for your desired band. Of course, the trans-

mission line should be a coaxial cable.

CAUTION: Protect your transceiver from lightning

by using a lightning arrestor.

■ Unpacking

After unpacking, immediately report any damage to the

delivering carrier or dealer. Keep the shipping cartons.

For a description and a diagram of accessory equip-

ment included with the IC-78, see ‘Supplied acces-

sories’ on p. 1 of this manual.

■ Selecting a location

Select a location for the transceiver that allows ade-

quate air circulation, free from extreme heat, cold, or

vibrations, and away from TV sets, TV antenna ele-

ments, radios and other electro-magnetic sources.

The base of the transceiver has an adjustable stand

for desktop use. Set the stand to one of two angles de-

pending on your operating conditions.

■ Grounding

To prevent electrical shock, television interference

(TVI), broadcast interference (BCI) and other prob-

lems, ground the transceiver through the GROUND

terminal on the rear panel.

For best results, connect a heavy gauge wire or strap

to a long earth-sunk copper rod. Make the distance be-

tween the [GND] terminal and ground as short as pos-

sible.

R WARNING: NEVER connect the [GND]

terminal to a gas or electric pipe, since the connec-

tion could cause an explosion or electric shock.

Antenna SWR

Each antenna is tuned for a specified frequency

range and SWR may be increased out-of-range.

When the SWR is higher than approx. 2.0:1, the

transceiver’s power drops to protect the ﬁnal transis-

tor. In this case, an antenna tuner is useful to match

the transceiver and antenna. Low SWR allows full

power for transmitting even when using the antenna

tuner. The IC-78 has an SWR meter to monitor the

antenna SWR continuously.

PL-259 CONNECTOR INSTALLATION EXAMPLE

30 mm ≈

⁄8 in 10 mm ≈

⁄8 in 1–2 mm ≈

⁄16 in

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft

solder

Coupling ring

Slide the coupling ring

down. Strip the cable

jacket and soft solder.

Slide the connector

body on and solder it.

Screw the coupling

ring onto the

connector body.

Strip the cable as

shown at left. Soft sol-

der the center con-

ductor.

INSTALLATION AND CONNECTIONS

■ Required connections

PWR

MICROPHONES (p. 45)

SM-20

or SM-6,

SM-8

HM-36

GROUND (p. 8)

Use the heaviest gauge wire

or strap available and make

the connection as short as

possible.

Grounding prevents electrical

shocks, TVI and other

problems.

ANTENNA

[Example]: 1.8–30 MHz bands

DC POWER SUPPLY

PS-85

CW KEY

A straight key can be used when the

internal electronic keyer is turned

OFF in “CW PADDL” in

initial set

mode

. (p. 32)

AH-710

•Front panel

•Rear panel

INSTALLATION AND CONNECTIONS

■ Power supply connections

Use an optional PS-85

DC POWER SUPPLY

when operat-

ing the IC-78 with AC power. Refer to the diagrams

below.

CAUTION:

Before connecting the DC power cable,

check the following important items. Make sure:

•The [PWR] switch is OFF.

•Output voltage of the power source is 12–15 V

when you use a non-Icom power supply.

•DC power cable polarity is correct.

Red : positive + terminal

Black : negative _ terminal

CONNECTING A VEHICLE BATTERY

12 V

battery

Supplied

DC power cable

+ red

_ black

Crimp

Solder

Grommet

NEVER connect to

a 24 V battery.

NOTE: Use terminals for

the cable connections.

CONNECTING NON-ICOM DC POWER SUPPLY

DC power

socket

DC power supply

AC outlet

AC cable

20 A fuses

Supplied

DC power cable

13.8 V 20 A

black

red

CONNECTING PS-85 DC POWER SUPPLY

PS-85

Connect to an AC outlet

using the supplied AC cable.

DC power cable

DC power

socket

INSTALLATION AND CONNECTIONS

■ Advanced connections

PWR

MIC

The AFSK modulation signal can be

input from [MIC]. (p. 25)

HEADPHONES

•Front panel

ANTENNA

Connects a linear amplifier, etc.

[REMOTE] (pgs. 41, 42)

Used for computer control and transceive operation,

and cloning operation between transceivers.

[SEND], [ALC]

Used for connecting a

non-Icom linear ampli-

fier.

EXTERNAL SPEAKER (p. 44)

SP-21, etc.

ACC SOCKETS (p. 6)

AT-120,

AT-130, or

AH-4 (p. 44)

AH-2b

or long wire

with

•Rear panel

INSTALLATION AND CONNECTIONS

■ External antenna tuners

CONNECTING AN ANTENNA TUNER (p. 44)

Coaxial cable (from the tuner)

Long wire or optional AH-2b

Ground

IC-78

AT-120/AT-130/AH-4

Control cable

Ground

OPERATION

■ Selecting a channel

The transceiver has 99 memory channels. However,

the number of channels can be restricted in

initial set

mode

(p. 32) depending on your needs. A total of 3

ways of channel selections are available to suit your

operating style.

D Using the channel selector

Rotate the channel selector clockwise (channel num-

ber increases) or counterclockwise (channel number

decreases) to select desired channel.

This is the most useful way of channel selection.

D Using up/down switches

Push [√ DN]/[UP ∫] on the front panel or the micro-

phone to select the desired channel.

This way is convenient when changing a small num-

ber of channels.

• When a duplex channel (different frequencies be-

tween transmit and receive) is selected, “ ” ap-

pears.

D Using the keypad

Enter the number of the desired channel number using

the keypad (0 to 9), then push [ENT].

This way is convenient for remembering the usage and

stored channel number, or when changing large a

number of channels.

• When a duplex channel (different frequencies be-

tween transmit and receive) is selected, “ ” ap-

pears.

• When a blank channel (no frequency is programmed)

is selected, “ ” appears.

Channel 1

Channel 2

Channel 99

Rotate the

channel selector

Push [√ DN]/[UP ∫]

switch

to select a

channel

• Example 1— selecting channel 8

Push

Push Push

Blinks

• Example 2— selecting channel 25

Push

Blinks

OPERATION

■ Frequency indication

By pushing the [FC], channel comment indication or

frequency indication can be selected.

D Transmit frequency indication

By pushing the [TXF], transmit frequency is indicated,

regardless channel comment or frequency indication.

While transmit frequency is indicated, “ ” ﬂashes.

■ Lock function

The lock function electronically locks the main dial to

prevent accidental channel changing.

Push [LOCK] to turn the lock function ON and OFF.

Before channel selection, turn this function OFF.

■ Scan function

Scan function repeatedly scans programmed chan-

nels. This function is convenient to wait for calls on

multiple channels.

q Set [RF/SQL] control at the center (12 o’clock) po-

sition (opening squelch), then rotate [RF/SQL]

control clockwise to the position where the noise

disappears.

w Push [√ DN] or [UP ∫] for 1 sec. to start channel

scan.

• The “SCAN” indicator appears.

e When a signal is received, channel scan pauses

on that channel.

r Push [√ DN] or [UP ∫] to cancel channel scan.

NOTE: The scan resume condition (the action

after signal receiving) can be selected as “scan re-

sume” or “scan cancel” in the

initial set mode

(p. 31).

[

√

DN]/[UP

∫

]

switches

Appears while lock function is activated.

Appears while

scanning.

ch 5

ch 2 ch 3 ch 4

ch 6ch 7

BLANK

ch 1

ch 99

Shallow

Deep

Recommended

position

Squelch control

Channel indication

Frequency indication

Push

Transmit frequency indication

Flashes

OPERATION

■ Mode selection

The [RF/SQL] control adjusts either the RF gain or

the squelch. The action depends on the operating

mode and the condition of the RF/SQL item in

initial

set mode

(p. 31).

•[RF/SQL] control priority

* The RF gain is set to maximum level when the [RF/SQL]

is set as [SQL] control.

The

RF gain

is used to adjust the receiver gain.

•Shallow rotation moves the S-meter to the right indicating

the signal strength which can be received.

The recommended position for RF gain is the 12

o’clock position since this sets RF gain to the max.

The

SQUELCH

removes noise output from the

speaker (closed condition) when no signal is received.

The squelch is available for the other modes.

•A segment appears in the S-meter to indicate the S-meter

squelch level.

•When set as the [RF/SQL] control

•When set as the [SQL] control

•When set as the [RF] control

■ RF gain and Squelch

Set mode setting SSB, CW, RTTY AM

rS (RF/SQL) RF/SQL RF/SQL

At (Auto) RF gain SQL*

Sq (SQL)

SQL* SQL*

(default)

RF gain adjustable

range

Maximum RF gain

Squelch is open.

S-meter squelch

threshold

Squelch is open.

S-meter squelch

threshold

Shallow Deep

Minimum RF gain

Adjustable range

Maximum RF gain

■ Basic voice receive and transmit

q Check the following in advance:

➥ Microphone is connected.

➥ [AF] control is set to minimum position.

➥ [RF/SQL] is set to center position (squelch open).

➥ [RIT] control set to center position.

Selects the desired channel to be received with the

channel selector, [√ DN]/[UP ∫], or 10-key pad.

•

The S-meter shows signal strength when signal is received.

e Adjust [AF] to the desired audio level when receiv-

ing a signal.

r Push [MODE] to select the desired operation mode,

if the received signal is in a different mode.

t If the bass or treble of the receive audio is too

strong, rotate [RIT] control to obtain clear audio.

(p. 19)

Push [TUNER] to tune the antenna tuner, if connected.

• “TUNE” indicator ﬂashes for 1 to 2 sec. for the ﬁrst tun-

ing on a channel.

u Push and hold [PTT] on the microphone, and speak

into the microphone at a normal voice level.

• The RF meter shows the output power according to your

voice level, when RF power meter is selected.

i Release [PTT] to return to receive.

[

RIT

]

[

]

[RF/SQL]

Microphone

connector

The following modes are available in the IC-78:

SSB (LSB/USB), CW, CW REV (CW reverse), RTTY,

RTTY REV (RTTY reverse) and AM.

➥ Push [MODE] to select desired operation mode.

➥ Push [MODE] for 1 sec. to change between USB

and LSB, CW and CW reverse or RTTY and RTTY

reverse. (SSB, CW and RTTY mode only)

•The selected mode is indicated in the function display.

Note: The selected mode can be used for temporary

operation only.

OPERATING MODE SELECTION

Push

momentarily

Push

for 1 sec.

USB LSB

CW CW

RTTY RTTY

MODE

OPERATION

ï Meter function

The bar meter in the function display acts as an S-

meter (for relative signal strength) during receive and

can be selected for one of three functions during

transmit.

•Push [SET] to select the PO, ALC and SWR meter

mode.

• Measuring SWR

q Conﬁrm that the output power is over 30 W.

w Push [SET] to select the SWR meter.

e Push [MODE] to select CW or RTTY operation.

•Key down or push [PTT] to transmit; then read the ac-

tual SWR from the meter:

≤1.5; well matched antenna

≥1.5; check antenna or cable connection, etc.

Display

Measurement

Indication

PO Indicates the relative RF output power.

ALC

Indicates the ALC level. When the meter

movement shows the input signal level ex-

ceeds the allowable level, the ALC limits the

RF power. In such cases, reduce the micro-

phone gain (see above).

SWR Indicates the SWR over the transmission line.

■ Functions for transmit

ï Output power and microphone gain

•Setting output power

q Push [SET] for 1 sec. to select

quick set mode

w Push [∫ UP]/[√ DN] to select “RF POWER”.

e Rotate the main dial to select the desired output.

•Output power is displayed in 101 steps (L, 1–99 and H)

but is continuously selectable.

•Available power

SSB/CW/RTTY: 2 (or less) to 100 W

AM: 2 (or less) to 40 W*

*Carrier power

Maximum output

power is selected.

•Setting microphone gain

Microphone gain must be adjusted properly so that

your signal does not distort when transmitted.

q Select SSB or AM mode.

w Push [SET] for 1 sec. to enter the quick set mode.

e Push [∫ UP]/[√ DN] to select “MIC GAIN”.

r Adjust the mic gain while speaking into the micro-

phone, so that the ALC meter does not exceed the

ALC zone.

t Push [SET] to exit

quick set mode

Microphone gain

is set to 50.

ALC zone

The best match is in this ran

OPERATION

ï Microphone compressor

IC-78 has a built-in, low distortion Mic compressor

circuit. This circuit increases your average talk power

in SSB mode and is especially useful when the re-

ceiving station is having difﬁculty copying your signal.

q Select USB or LSB mode.

w Push [COMP] switch to turn mic compressor ON.

•“COM” indicator appears.

e Conﬁrm the ALC level.

•Push [SET] to select the ALC meter.

•Speak into the microphone at a normal voice level.

•If the ALC meter peak past the ALC zone, re-adjust the

mic. gain. (p.16)

•Be sure the mic gain is in the range of 20 to 50.

Note: When the ALC meter peaks above the ALC

zone, your transmitted voice may be distorted.

The VOX (Voice-operated Transmission) function

switches between transmit and receive with your

voice. This function provides an opportunity to input

log entries into your computer, etc. while operating.

q Select “VOX” in

quick set mode

•Push [SET] for 1 sec. to select

quick set mode

•Push [∫ UP]/[√ DN] to select “VOX”.

w Rotate the channel selector to turn VOX function

ON.

e Select “VOX GAIN” in

quick set mode

•Push [∫ UP]/[√ DN] to select “VOX”.

r While speaking into the microphone, adjust [VOX

GAIN] with the channel selector, until the trans-

ceiver is transmitting.

t Select “VOX DELY” in

quick set mode

•Push [∫ UP]/[√ DN] to select “VOX Delay”

t While speaking into the microphone, adjust [VOX

DELY] as desired.

y Select “ANTI-VOX” in

quick set mode

•Push [∫ UP]/[√ DN] one or more times to select “AN

VOX”

u If the receive audio from the speaker switches the

transceiver to transmit during receive, adjust the

“ANTI-VOX” to the point where it has no effect.

i Push [SET] to exit

quick set mode

ï VOX operation

Rotate the

channel selector

ONOFF

[COMP] switch

Adjust [MIC GAIN] so that the ALC

meter reads within the ALC zone.

ALC zone

Appears when

mic compressor

is activated.

OPERATION

The AT-120, AT-130 or AH-4 matches the IC-78 to a

long wire antenna more than 7 m (23 ft) long (3.5 MHz

and above).

• See p. 11 for connection.

• See the connected antenna tuner’s instruction man-

ual for installation and antenna connection details.

• Setting example:

NEVER operate the AT-120, AT-130 or AH-4 without

an antenna wire. The tuner and transceiver will be

damaged.

NEVER operate the AT-120, AT-130 or AH-4 when it

is ungrounded.

Transmitting before tuning may damage the trans-

ceiver. Note that the AT-120, AT-130 or AH-4 cannot

tune when using a

⁄2 λ long wire or multiple of the op-

erating frequency.

TUNER OPERATION

•Tuner type setting (p. 32)

q Push [PWR] for 1 sec. to turn power OFF.

w Enter

initial set mode

• Turn power ON while pushing and holding [SET].

e Push [UPY] or [Z DN] to select [TUNER].

r Selects connected antenna tuner type by rotating

the channel selector.

• no : no antenna tuner is selected.

• 4 : AH-4 is selected.

• 12 : AT-120 is selected.

• 13 : AT-130 is selected.

y Push [PWR] for 1 sec. to turn power OFF.

u Push [PWR] to turn power ON again.

• MANUAL TUNING

q Set the desired channel.

w Push [TUNER] to start tuning.

• “ ” blinks and “CW” appears while tuning.

e “”lights constantly when tuning is completed.

(except when AT-120 is connected; the indicator

goes out)

• When the connected wire cannot be tuned, the “ ”

goes out, the antenna tuner is bypassed and the an-

tenna wire is connected to the antenna connector on

the transceiver directly.

r To bypass the antenna tuner manually, push

[TUNER]. (AH-4 only; starts tuning again when AT-

120 or AT-130 is connected)

For mobile operation

For outdoor operation

Long wire

Optional AH-2b

antenna element

MIC

IC-718

PHONES

SQL AF SHIFT RIT

LOCK

MODE

FILTER

PWR

TUNER

∫

COMP

P.AMP

ATT

SET

ENT

F-INP

V/M

A=B

M=CL

SCN

ANF

A/B

VOX

SPL

M V

▲



AT-120

AT-130

AH-4

WARNING: HIGH VOLTAGE!

NEVER touch the antenna element while tuning or

transmitting.

Tuning is required for each frequency. Be sure to

re-tune the antenna before transmitting when you

change the frequency— even slightly.

[TUNER] switch

ï Optional AT-120/AT-130/AH-4 operation

Tuning indicator;

Blinks: While tuning

Appears: Tune is completed

Disappears: Tune is not completed

(When AT-120 is connected, the

indicator disappears even when

tuned completely.)

OPERATION

■ Functions for receive

ï RIT function

The RIT (Receive Incremental Tuning) function com-

pensates for off-frequencies of communicating sta-

tions. The function shifts the receive frequency up to

1.2 KHz without moving the transmit frequency.

q Rotate the RIT control to cancel the off-frequen-

cies.

•“ ” appears on the display.

•The transmit frequencies are not shifted.

w To cancel the RIT function,

rotate the RIT control to the

center position.

•“ ” disappears.

ï Preamp

The preamp amplifies received signals in the front

end circuit to improve the S/N ratio and sensitivity.

Turn this function ON when receiving weak signals.

➥ Push [P.AMP] to turn the the preamp ON and OFF.

• Preamp functions below 1.6 MHz, but sensitivity may

be reduced in some cases.

Appears when the

preamp is ON.

ï Attenuator

The attenuator prevents desired signals from distort-

ing when very strong signals are near the desired fre-

quency or when very strong electric fields, such as

from broadcasting stations, are near your location.

➥ Push [ATT] to turn the 20 dB attenuator function

ON and OFF.

•“ATT” appears when the attenuator is turned ON.

Appears when the

attenuator is ON.

RIT off position

ï Noise blanker

The

noise blanker

reduces pulse-type noise such as

that generated by automobile ignition systems.

q Push the [NB] switch to turn the noise blanker ON.

• [NB] indicator appears.

w Push the [NB] for 1 sec. to enter the noise blanker

level setting condition.

e Rotate the channel selector to adjust the noise

blanker level.

r Push [NB] to exit the setting condition.

t Push [NB] again to turn the noise blanker function

OFF.

• [NB] indicator disappears.

•When using the noise blanker, received signals

may be distorted if they are excessively strong.

•The noise blanker function in AM mode can be

deactivated depending on

initial set mode

setting.

(p. 31)

[NB] switch

Appears when the

noise blanker is ON.

ï Meter peak hold

The meter peak hold function freezes the highest dis-

played bar segment in any meter function for about

0.5 sec. so that you can more easily read the meter.

This function can be turned ON and OFF in

initial set

mode

. (p. 31)

Initial reception of a signal

results in an S-meter reading

of 40 dB.

The highest indicated bar

remains displayed for 0.5 sec.

even when the signal strength

decreases.

The IF shift function electronically narrows the pass-

band frequency of the IF (intermediate frequency)

and cuts out higher or lower frequency components

of the IF to reject interference. The function shifts the

IF frequency up to ±1.2 KHz in SSB/CW/RTTY

modes and up ±250 Hz in CW-narrow/RTTY narrow

modes. The IF shift is not available in AM mode.

IF SHIFT OPERATION EXAMPLE

•Adjust the [SHIFT] control for a minimum interfer-

ence signal level.

•When IF shift is used, the audio tone may be

changed.

•Set the IF shift control to its center position when

there is no interference.

SHIFT SHIFT

SHIFT

IF center frequency

Interference

Desired signal

Passband

Both controls at

center position

Cutting a lower

passband

Cutting higher

passbands

Interference

Desired si

nal

Passband

ï IF shift function

OPERATION

■ Filter selection

The ﬁlter selection switches the IF passband width as

shown in the table at right.

The ﬁlter selection is for temporal setting.

q Select the desired mode programmed channel.

(p. 13)

w Push [SET] for 1 sec. to enter

quick set mode

e Push [UPY] or [ZDN] several times until “FILTER”

appears on the display.

r Rotate the channel selector to select desired pass-

band width.

• Either “ ” or “ ” does not appear while the nor-

mal ﬁlter is selected.

•“ ” appears when the wide ﬁlter is selected.

•“ ” appears when the narrow ﬁlter is selected.

t Push [SET] to exit

quick set mode

•Optional ﬁlter variations

When an optional ﬁlter is installed, set the optional

ﬁlter in

initial set mode

. An optional ﬁlter is not se-

lected by default.

FL-65 (2.4 kHz)*

FL-257 (3.3 kHz)*

FL-96 (2.8 kHz)*

FL-222 (1.8 kHz)*

FL-52A (500 Hz)*

FL-53A (250 Hz)*

2nd IF signal

2nd IF signal/DET

CFWS450HT (6 kHz)*

Through

AM; Narrow,

SSB/CW/RTTY; Normal

AM; Normal,

SSB/CW/RTTY; Wide

OPTION

Name Band width Mode

FL-52A 500 Hz/–6dB CW/RTTY-N

FL-53A 250 Hz/–6dB CW/RTTY-N

FL-96 2.8 KHz/–6dB SSB-W

FL-222 1.8 KHz/–6dB SSB-N

FL-257 3.3 KHz/–6dB SSB-W

•Filter construction (Rx)

•Filter selection table

no FL-52A FL-53A FL-96 FL-222 FL-257

WIDE 6 kHz* 6 kHz* 6 kHz*

6 kHz*

SSB

2.8 kHz 3.3 kHz

NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz

NARROW — 500 Hz* 250 Hz* — 1.8 kHz* —

WIDE 6 kHz* 6 kHz* 6 kHz*

6 kHz*

2.8 kHz 3.3 kHz

NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz

NARROW — 500 Hz 250 Hz — 1.8 kHz —

WIDE 6 kHz* 6 kHz* 6 kHz*

6 kHz*

RTTY

2.8 kHz 3.3 kHz

NORMAL 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz

NARROW — 500 Hz 250 Hz — 1.8 kHz —

WIDE — — — — — —

NORMAL 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz 6 kHz

NARROW 2.4 kHz

2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz 2.4 kHz

500 Hz* 250 Hz* 2.8 kHz* 1.8 kHz* 3.3 kHz*

*Can be used when the expanded ﬁlter selection is turned on in the

initial set mode

. (see next page)

OPERATION

When an optional ﬁlter is installed, set the optional ﬁl-

ters in

initial set mode

. Optional filters are not se-

lected by default. (p. 33)

D Optional ﬁlter setting

q While pushing and holding [SET], push [PWR] to

enter

initial set mode

w Push [UPY] or [Z DN] several times until “FIL” ap-

pears on the display.

e Rotate the channel selector to select the installed

ﬁlter.

•“no,” “52A,” “53A,” “96,” “222” and “257” indicate no op-

tional filter, FL-52A, FL-53A, FL-96, FL-222 and

FL-257, respectively for 455 kHz IF ﬁlter selection.

r Push [PWR] for 1 sec. to exit

initial set mode

D Expanded ﬁlter selection

The selectable ﬁlter combinations can be expanded

by setting the expanded ﬁlter selection to ON. Then

extra wide or narrow ﬁlter can be selected on desired

mode.

q While pushing and holding [SET], push [PWR] to

enter

initial set mode

w Push [UPY] or [Z DN] several times until “EXP

FIL” appears.

e Rotate the channel selector to turn the expanded

ﬁlter selection ‘on’.

•If ‘on’ is selected, the expanded ﬁlter selection can be

used.

•Wide/narrow ﬁlter selection

r Push [UPY] several times until

“WIDE ✻✻” or “NAR ✻✻” appears

on the display.

t Push [MODE] several times to se-

lect the desired mode.

y Rotate the channel selector to se-

lect a ﬁlter.

u Repeat steps t and y to select

IF filters for other modes, if de-

sired.

•The filter combinations are stored

depending on operating modes.

i Push [PWR] for 1 sec. to exit

ini-

tial set mode

■ Filter setting

•Narrow ﬁlter setting table

•Wide ﬁlter setting table

no FL-52A FL-53A FL-96 FL-222 FL-257

SSB

no no no

96 (2.8 kHz)

257 (3.3 kHz)

THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz)

no no no

96 (2.8 kHz)

257 (3.3 kHz)

THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz)

RTTY

no no no

96 (2.8 kHz)

257 (3.3 kHz)

THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz) THU (6 kHz)

——————

: default

no FL-52A FL-53A FL-96 FL-222 FL-257

SSB

—nono

— 222 (1.8 kHz)

—

52A (500 Hz) 53A (250 Hz)

—

52A (500 Hz) 53A (250 Hz) — 222 (1.8 kHz)

—

RTTY

—

52A (500 Hz) 53A (250 Hz) — 222 (1.8 kHz)

—

NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz) NOR (2.4 kHz)

52A (500 Hz) 53A (250 Hz) 96 (2.8 kHz) 222 (1.8 kHz)

257 (3.3 kHz)

: default

OPERATION

■ Function for CW

ï Connection for CW

1234

8765

10 11 12

Paddle

[ELEC KEY]

[MICROPHONE]

See p. 25 for connection details:

Paddle operation from front panel

MIC connector.

Straight key

Microphone

Initial set mode

setting (p. 32)

[ACC]

123

765

10 11

For no break-in operation:

Connect an external switch such as

a foot switch; or use the RTTY

SEND terminal for all bands.

(See p. 25)

: normal

: reverse

: off

: UP/DN key

ï CW operation

q Connect a paddle or straight key as above.

w Select CW (or CW-REV) programmed channel.

e Set CW break-in operation as semi break-in, full

break-in or OFF. (see p. 30)

• Push [SET] for 1 sec. to enter

quick set mode

• Push [UPY] or [Z DN] several times until “BK-IN” ap-

pears, then rotate the channel selector to select the

desired condition:

FL: full break-in

SE: semi break-in

oF: no break-in

r Set the CW delay time when semi break-in opera-

tion is selected. (see p. 30)

• Push [SET] for 1 sec. to enter

quick set mode

; push

[UPY] or [Z DN] several times until “BK-DELAY” ap-

pears, then rotate the channel selector to select the de-

sired delay time.

CW mode and semi

break-in operation

is selected.

Delay time of 6 dots

is selected in quick

set mode for semi

break-in operation.

OPERATION

ï CW pitch control

The received CW audio pitch and monitored CW

audio pitch can be adjusted to suit your preferences

(300 to 900 Hz) without changing the operating fre-

quency.

q Push [SET] for 1 sec. to enter quick set mode.

w Push [∫ UP]/[√ DN] one or more times until “CW

PITCH” appears, then rotate the main dial to set

the desired pitch. (p. 29)

ï CW reverse mode

The CW-R (CW Reverse) mode receives CW signals

with a reverse side CW carrier point like that of LSB

and USB modes. Use this mode when interference

signals are near the desired signal and you want to

change the interference tone.

q Push [MODE] one or more times to select CW

mode.

w Push [MODE] for 1 sec. to switch between CW and

CW-R modes.

BFO

1/3 octave

Push for 1 sec.

Desired signal

(600 Hz)

CW mode (USB side)

Interference

(800 Hz)

BFO

1/2 octave

Desired signal

(600 Hz)

CW REV mode (LSB side)

Interference

(400 Hz)

MODE

ï Electronic CW keyer

The IC-78 has an electronic keyer. Both keying speed

and weight (the ratio of dot : space : dash) can be set

quick set mode

•Setting the electronic keyer

q Push [MODE] one or more times to select CW

mode.

w While pushing and holding [SET], push [PWR] to

enter

initial set mode

e Push [∫ UP]/[√ DN] one or more times until “CW

PADDL” appears, then rotate the main dial to se-

lect the paddle type.

• When “ud” is selected, the up/down switches on the mi-

crophone can be use as a paddle.

• When using up/down switches as a paddle, squeeze

keying function is not available.

r Push [∫ UP]/[√ DN] one or more times until “KEY

RAT” appears, then rotate the main dial to select

the desired weight.

• Key weight can be selected from 2.8 to 4.5.

t Push [∫ UP]/[√ DN] one or more times until “KEY

SPD” appears, then rotate the main dial to select

the desired weight.

• Key weight can be select from 6 to 60.

Paddle operation from front panel MIC connector

Connect a CW paddle as at right to operate an elec-

tronic keyer from the front panel MIC connector.

•This function is available from the front panel mic con-

nector only.

• Be sure to select item “n,”“r,”or “oF” in CW PADDL in

initial set mode.

•Connect straight key to “DOT” side.

This shows the

default setting for

the CW pitch control

(600 Hz).

KEYING WEIGHT EXAMPLE: morse code “K”

*SPACE and DOT length can be adjusted with “KEY SPD

in the quick set mode only.

DASH

Weight setting:

1:1:3 (default)

Weight setting:

Adjusted

DASH

DOT

(Fixed*)

Adjustable range SPACE (Fixed*)

front panel

MIC connector

MIC U/D

paddle

DOT

DASH

3.9 kΩ ±5%

2.2 kΩ ±5%

Paddle operation

OPERATION

■ Function for RTTY

ï Connection for RTTY (FSK)

Rear panel

TU or TNC

Personal computer

Rear panel

view

Use either the ACC or one of the two

⁄8″ plugs.

Connect SQL line when required.

SQL*

AF out

SEND

GND

FSKK

GND

2-conductor

⁄8″ plug

[ACC]

[EXT SP]

1234

5678

9101112

ï Connection for AFSK

To a TU or TNC

and personal computer.

Use either the ACC or microphone connector.

SQL*

AF out

AF in

SEND

GND

1234

5678

9101112

Rear panel

view

Connect SQL line when required.

q Mic input

[MIC] connector

(Front panel view)

i AF output

u Mic GND

y PTT GND

t PTT

r SQL

[ACC] connector

OPERATION

ï RTTY (FSK) operation

q Connect a terminal unit as at p. 25.

w Select RTTY (or RTTY-R) mode with [MODE].

e Select the desired FSK tone and shift frequencies

as below.

r Set the desired frequency with the channel selec-

tor.

t Operate the connected PC or TNC (TO).

PRESETTING FOR RTTY

•Tone frequency

q Push [SET] for 1 sec. to enter

quick set mode

w Push [∫UP]/[√ DN] several times until “TON 2125”

appears, then rotate the channel selector to select

the desired tone frequency.

• Shift frequency

q Push [SET] for 1 sec. to enter

quick set mode

w Push [∫ UP]/[√ DN] several times until “SIFT 170”

appears, then rotate the channel selector to select

the desired tone frequency.

• RTTY reverse mode

Received characters are occasionally garbled when

the receive signal is reversed between MARK and

SPACE. This reversal can be caused by incorrect

TNC connections, settings, commands, etc.

To receive a reversed RTTY signal correctly, select

RTTY-R (RTTY reverse) mode.

•Push [MODE] for 1 sec. to select RTTY-R (RTTY re-

verse) mode.

ï RTTY (AFSK) operation

q Connect a terminal unit as on p. 25.

w Select SSB (LSB) mode with [MODE].

•Generally, LSB is used on the HF bands.

e Select the desired FSK tone/shift frequencies and

keying polarity the same way as FSK operation.

r Set the desired frequency with the main dial.

t Operate the connected PC or TNC (TO).

RTTY mark frequency

is set to 2125 Hz.

2125, 1615 and 1275

Hz are available.

RTTY shift frequency

is set to 850 Hz.

850, 425, 200 and

170 Hz are available.

RTTY mode

is selected.

ReverseNormal

BFO

170

2125

170

2125

BFO

mark

space

displayed freq.displayed freq.

mark

space

OPERATION

■ Channel comment programming

The IC-78 has a capability to assign up to 8-character

channel comments for each operating channel. This

provides easy recognition of channel usage, or station

names, etc.

q Select the desired channel by pushing

[√ DN]/[UP ∫], rotating the channel selector, or

using the keypad. (p. 13)

w Push [FC] to select channel comment indication, if

desired.

e Push [ENT] for 1 sec. to enter channel comment

programmable mode.

• 1st digit blinks

r Push corresponding keys to enter desired charac-

ters. (see the following chart)

• Push [√ DN]/[UP ∫], or rotate the channel selec-

tor to move the cursor to select the next charac-

ter, or to change the digit.

t Push [ENT] for 1 sec. to store the channel com-

ment.

ï Corresponding characters

(1), (space), (’),

( ( ), ( ) ), (∗), (+),

(–), (/), (<), (=),

(>), (@)

(4), (G), (H), (I)

(7), (P), (R), (S)

(space w/change digit)

KEY Assignable characters

(2), (A), (B), (C)

(5), (J), (K), (L)

(8), (T), (U), (V)

(0), (Q), (Z)

KEY Assignable characters

(3), (D), (E), (F)

(6), (M), (N), (O)

(9), (W), (X), (Y)

KEY Assignable characters

Push for 1 sec.

• Channel comment programming example

×4 (I)

×4 (C)

×1 (2)

×4 (O)

×2 (M)

×2 (2 spaces)

Push or rotate channel

selector, then;

SET MODE

■ General

Set mode is used for programming infrequently

changed values or conditions of functions. The IC-78

has 2 separate set modes:

quick set mode

and

initial

set mode

D Quick set mode operation

q While power is ON, push [SET] for 1 sec.

• Quick set mode is selected and one of its items ap-

pears.

w Push [UPY] or [Z DN] to select the desired item.

e Rotate the main dial to set the values or conditions

for the selected item.

r Repeat w and e to set other items.

t To exit quick set mode, push [SET] momentarily.

D Initial set mode operation

q Push [PWR] for 1 sec. to turn power OFF.

w While pushing and holding [SET], push [PWR] to

turn power ON.

• Initial set mode is selected and one of its items appears.

e Push [UPY] or [Z DN] to select the desired item.

r Rotate the main dial to set the values or conditions

for the selected item.

t Repeat e and r to set other items.

y To exit initial set mode, push [PWR] for 1 sec. to

turn power OFF.

u Push [PWR] to turn power ON again.

• The conditions selected in initial set mode are now ef-

fective.

Item

Value of

Condition

Item

Value of

condition

[DISPLAY EXAMPLE: INITIAL SET MODE]

[DISPLAY EXAMPLE: QUICK SET MODE]

[DIAL]

[√]

[∫]

[SET]

[DIAL]

[PWR]

[√]

[∫]

[SET]

SET MODE

•RF power

This item adjusts the RF output power. The RF output power can be adjusted

from L, 1 to 99 and H by indication, however, it can be adjusted continuously.

•The default is H (maximum power).

Note that while adjusting the output power, the power meter is displayed auto-

matically.

•Mic gain

This item adjusts microphone gain from 0 to 99 and H by indication, however, it

can be adjusted continuously.

The default is 50.

Note that while adjusting the mic gain, the ALC meter is displayed automatically.

•VOX gain

This item adjusts the VOX gain for the VOX (voice activated transmit) function.

The default is 50.

•Anti VOX level

This item adjusts the ANTI-VOX gain for the VOX (voice activated transmit).

The default is 50.

•CW pitch

This item adjusts CW pitch. CW pitch is adjustable from 300 Hz to 900 Hz in

10 Hz steps.

The default is 60 (600 Hz).

•VOX delay

This item adjusts VOX (voice activated transmit) delay time. The delay time can

be adjusted from 0 to 2 sec. in 0.1 sec. units.

The default is 10 (1.0 sec).

■ Quick set mode items

•Filter

This item selects ﬁlter bandwidth from wide, normal, and narrow.

The default is normal (no indication appears).

•VOX function

This item selects the VOX function from ON and OFF.

The default is of (OFF).

SET MODE

•BK-IN

This item selects break-in type for CW operation.

There are three selectable values:

oF : No break-in operation available (default).

SE : Semi break-in operation available.

FL : Full break-in operation available.

•BK-IN delay

This item adjusts break-in delay time for CW semi break-in operation. The delay

time is selectable from 2.0 to 13 (dots).

The default is 7.

•Key speed

This item adjusts the CW key speed. The key speed can be selected from 6 to

60* wpm.

The default is 20 wpm.

*40, 44, 47, 50, 52, 54, 56, 57, 59 cannot be selected.

•Key ratio

This item sets the CW key ratio (or weight). The ratio can be selected from 2.8 to

4.5.

The default is 30 (3.0).

•RTTY shift

This item adjusts RTTY shift. There are 4 selectable values: 170, 200, 425 and

850.

The default is 170 Hz.

•Dimmer

This item selects LCD back light brightness. There are 3 selectable values: Off,

Low and High.

The default is HI (High).

•RTTY mark tone

This item selects RTTY tone. There are 3 selectable values: 1275, 1615 and

2125 Hz.

The default is 2125 Hz.

•Tuning step

This item selects tuning step for the channel selector’s tuning.

The default is 1 k (1 kHz).

■ Quick set mode items— (continued)

SET MODE

•RF/SQL control action

Select [RF/SQL] control action from RF/squelch, automatic (acts as squelch in

AM modes; as RF in SSB/CW/RTTY modes), or the squelch. (See p. 15)

The default is Sq (squelch).

•Beep level

Adjusts the conﬁrmation beep level from 1 to 99.

The default is 50.

•Side-tone level

Adjusts the CW side-tone level from 1 to 99.

The default is 30.

•Beep

A beep sounds each time a switch is pushed to conﬁrm it. This function can be

turned OFF for silent operation.

The default is on.

■ Initial set mode items

•Meter peak hold

Selects meter peak hold function on or off.

The default is on.

•Scan resume

Selects the scan resume function ON or OFF.

ON: Resumes 10 sec. after stopping on a signal (or 2 sec. after a signal disappears);

OFF: Does not resume after stopping on a signal.

The default is on.

•AM Noise blanker

When this item is set to ON, the noise blanker function is available in AM mode.

This is useful when communicating in AM mode (the noise blanker function should

not be used when listening to regular AM broadcasts as it may degrade the receive audio)

The default is on.

•Scan speed

Selects scanning speed from High and Low.

The default is HI (High).

SET MODE

•Key type

Selects the CW paddle type. Four selections are available.

•n : normal (for electronic keyer use)

• r : reverse (for electronic keyer use)

•oF : Turns OFF the electronic keyer (for straight key use)

•ud : For using the microphone’s [UP]/[DN] keys instead of the paddle.

The default is n (normal).

•Tuner type

Selects the connected antenna tuner type. Four selections are available.

•no : No optional tuner is connected.

•4 :When AH-4 is connected.

•12 :When AT-120 is connected.

•13 :When AT-130 is connected.

The default is no.

•Number of maximum memory channels

Sets number of programmable memory channels from 1 to 99.

The default is 99.

•CI-V baud rate

Sets the data transfer rate. When “Auto” is selected, the baud rate is automati-

cally set according to the connected controller or remote controller.

The default is At (Auto).

•CI-V address

To distinguish equipment, each CI-V transceiver has its own Icom standard ad-

dress in hexadecimal code. The IC-78’s address is 62.

When 2 or more IC-78s are connected to an optional CT-17

V LEVEL CON

VERTER

, rotate the main dial to select a different address for each IC-78 in the

range 01H to 7FH.

The default is 62.

•CI-V Transceive

Transceive operation is possible with the IC-78 connected to other Icom HF

transceivers or receivers. When “on”is selected, changing the frequency, oper-

ating mode, etc. on the IC-78 automatically changes those of connected trans-

ceivers (or receivers) and vice versa.

The default is on.

•CI-V 731 mode

When connecting the IC-78 to the IC-735 for transceive operation, you must

change the operating frequency data to 4 bytes.

•This item MUST be set to “on” when operating the transceiver with the IC-735.

The default is oF (off).

■ Initial set mode items— (continued)

SET MODE

•OPTION Filter

When an optional IF ﬁler is installed, this selection is necessary, otherwise the

ﬁlters cannot be selected. Selections available are FL-96, FL-222, FL-52A, FL-

53A, FL-257 and none (default). See p. 21 for usable ﬁlters for each mode and

see p. 38 for ﬁlter installation.

•Expand Filter

When an optional IF ﬁlter is installed, this selection expands ﬁlter and ﬁlter se-

lection (W/N) key combination in operating mode independently.

The default is oF (off).

•Filter select (Wide)

When an optional IF ﬁlter is installed, you can arrange the wide ﬁlter selection.

(p. 22)

This item appears only when the Expand Filter, as above, is turned ON.

■ Initial set mode items— (continued)

•Filter select (Narrow)

When an optional IF ﬁlter is installed, you can arrange the narrow ﬁlter selection.

(p. 22)

This item appears only when the Expand Filter, as above, is turned ON.

EXTRA FEATURES

■ INTRODUCTION

Extra features, explained in this section, are available only on some versions of the IC-78. Therefore, the

instructions in this section are not necessary for some versions.

To enter VFO mode, push [FC] for 1 sec.

•VFO indicator appears.

•In the VFO mode, channel comment cannot be indi-

cated.

[FC]

■ VFO operation

D Entering VFO mode

D Tuning

The transceiver has several ways of tuning for tem-

poral operation as follows;

• Tuning with the channel selector

By rotating the channel selector, operating fre-

quency changes in the desired tuning step, set in

the

quick set mode

. (p. 30)

This is the most convenient way when searching

for signals around the pre-programmed frequency.

• Tuning with the keypad

Enter the frequency as follows.

➥ For duplex operation setting, push [TXF] then set

the transmit frequency, after the receive frequency

is set.

Appears only when 1 Hz

tuning step is selected.

Changing digit; according to selected tuning step

•To set to 25.118 MHz

•To set to 706 KHz (0.706 MHz)

•To set to 5.0000 MHz

•To change 13.1430 MHz to 13.3190 MHz

•Start

EXTRA FEATURES

D Channel programming

The programmed frequencies, both transmit and re-

ceive, in operating channel can be re-programmed

from the VFO mode.

• Simplex channel programming

q Push [FC] for 1 sec. to enter VFO mode.

w Push [√ DN]/[UP ∫] to select the desired channel.

•Any channels, even blank channels, can be selected.

•If you want to select the desired channel with keypad,

select the channel before entering VFO mode.

e Tune to the desired receive frequency with the

channel selector, or keypad. (p. 34)

•Selects operating mode and other settings, such as ﬁl-

ter selection, RF attenuator, etc., if necessary.

r Push [ENT] for 1 sec. (3 beeps are emitted), to store

the frequency into the selected channel.

•Reprogram the channel comment, if necessary. (p.27)

• Split (duplex) channel programming

q Store receive frequency as instructed above.

w Push [TXF] to indicate the transmit frequency.

•The “TX” indicator blinks.

e Tune to the desired transmit frequency with the

channel selector, or keypad. (p. 34)

r Push [ENT] for 1 sec. (3 beeps are emitted), to store

the transmit frequency into the selected channel.

•The “ ” indicator appears.

[FC]

[ENT]

D Call channel programming

The programmed frequencies, both transmit and re-

ceive, in call channel can also be re-programmed

from the VFO mode.

➥ Select channel 0 (call channel) with the keypad in

the channel mode or [√ DN]/[UP ∫] in the VFO

mode.

•The channel 0 cannot be selected with the channel se-

lector

•When the channel 0 is selected with [CALL], the stored

frequencies cannot be re-programmed.

• Pushing [FC] for 1 sec. to enter into VFO mode when

channel 0 is selected in channel mode.

➥ Set receive or both receive and transmit frequen-

cies, operating mode and other settings as above,

then push [ENT] for 1 sec. to store into call chan-

nel.

[TXF]

[ENT]

EXTRA FEATURES

■ 2-Tone alarm operation

The 2-tone alarm is used for instant emergency opera-

tion. When the 2-tone alarm function is activated, the

call channel (2182 kHz, distress channel, is pre-pro-

grammed) is selected automatically, and emits a dis-

tress alarm.

D Operation

➥ Push [TONE] to emit a distress alarm signal for a

speciﬁed time period from the speaker only.

•“ ” appears.

•Push [TONE] again to cancel the distress alarm signal

emission.

•Push [CALL] to return to previous condition.

➥ Push [TONE] for 1 sec. to transmit a distress alarm

or alarm testing signal for a speciﬁed time period.

•“ ” appears with the transmit indicator.

•Push [TONE] again to cancel the distress alarm signal

transmission.

•Push [CALL] to return to previous condition.

[TONE]

D Channel clearing

If un-necessary channels are available, the stored fre-

quency can be cleared. The cleared channels are

skipped in the channel mode operation,

q Select desired channel in channel mode. (p. 13)

w Enter VFO mode by pushing [FC] for 1 sec.

•Channel selection with [√ DN]/[UP ∫] is also possible

in the VFO mode.

e Push [0], then [ENT].

r Push [ENT] for 1 sec. (3 beeps are emitted), to clear

the selected channel.

•The “ ” indicator appears.

Note: Blank channels cannot be selected with

[√ DN]/[UP ∫], and channel selector; can only

be selected with the keypad.

Appears when

INSTALLATION AND CONNECTIONS

■ Opening the transceiver’s case

Follow the case and cover opening procedures shown

here when you want to install an optional unit or adjust

an internal unit, etc.

CAUTION: DISCONNECT the DC power cable

from the IC-78 before performing any work on the

transceiver. Otherwise, there is danger of electric

shock and/or equipment damage.

q Remove the 5 screws from the top of the trans-

ceiver and 4 screws from the sides, then lift up the

top cover.

w Remove the 5 screws from the bottom of the trans-

ceiver, then remove the bottom cover.

■ Optional bracket and carrying handle

D Mounting bracket

An optional IC-MB5

MOBILE MOUNTING BRACKET

available to install the radio under a table, on a wall,

in a vehicle, etc.

Select an area to mount the transceiver keeping in

mind that the weight of the transceiver is approx.

3.80kg.

D Carrying handle

An optional handle allows you to easily carry and

transport the transceiver.

Attach the MB-23

CARRYING HANDLE

with the supplied

rubber feet as shown.

INSTALLATION AND CONNECTIONS

■ CR-338

HIGH STABILITY CRYSTAL UNIT

By installing the CR-338, the total frequency stability

of the transceiver will be improved.

q Remove the bottom cover as shown in the previous

diagram.

w Disconnect W2 from J4401 (MAIN unit) and W3

from J4201 (MAIN unit).

e Remove 9 screws from the PLL unit, disconnect P4

from J201 (MAIN unit) and P2 from J401 (MAIN

unit), then remove the PLL unit.

r Remove the supplied internal crystal and replace

with the CR-338.

t Return the PLL unit, plugs and flat cables to their

original positions.

y Adjust the reference frequency at C16 using a fre-

quency counter if desired.

• Connect the frequency counter to P 2 (PLL unit).

u Return the bottom cover to its original position.

CR-338

PLL unit

Internal crystal

W 3

W 2

J 4201

J 4401

P 4

J 201

J 401

P 2; Frequency check point

(Connect a frequency counter

and adjust the frequency to

64.00000 MHz with C 16.)

C 16

MAIN unit

PLL unit

■ Optional IF ﬁlters

Several IF ﬁlters are available for the IC-78. You can

install 1 ﬁlter for 455 KHz IF. Choose the appropriate

ﬁlter for your operating needs. (pgs, 21, 22)

D Installation

q Remove the bottom cover as shown on the p. 48.

w Remove 7 screws, connection cable p1 from J1, p5

from J701, W4 from J4101 and W5 from J4001 and

2 Tr-clampers as shown in the diagram below.

e Install the de-

sired 455 KHz

filter as shown

in the diagram

at right.

r Mount the filter

with the sup-

plied washers

and nuts.

t Solder the 4

leads.

y Return the

MAIN unit and

bottom cover to

their original po-

sitions.

After filter installation, specify the installed filter

using

initial set mode

. (p. 33) Otherwise, the in-

stalled ﬁlter will not function properly.

J 701

Tr-clamper

MAIN unit

J4101

Optional IF filter

Solder 4 leads

Solder the 4 leads

PROBLEM POSSIBLE CAUSE SOLUTION REF.

RECEIVE

POWER

TRANSMIT

DISPLAY

MAINTENANCE

■ Troubleshooting

The following chart is designed to help you correct

problems which are equipment malfunctions.

If you are not able to locate the cause of a problem or

solve it through the use of this chart, contact your near-

est Icom Dealer or Service Center.

Power does not come

on when the [PWR]

switch is pushed.

No sounds comes out

from the speaker.

Sensitivity is too low,

and only strong signals

are audible.

Received audio is un-

clear or distorted.

Your signal does not

reach as far away as

usual.

Transmit signal is un-

clear or distorted.

The displayed channel

does not change prop-

erly.

• Power cable is improperly connected.

• Fuse is blown.

• Volume level is too low.

• The squelch is closed.

• The transceiver is in transmitting condi-

tion.

• The antenna is not connected properly.

• Antenna is not properly matched to the

operating frequency.

• Wrong tuner condition is selected in set

mode.

• The attenuator is activated.

• Wrong type of mode (emission) is se-

lected.

• Noise blanker is turned ON when receiv-

ing a strong signal.

• The [RIT] control is rotated too far clock-

wise, or counterclockwise.

• Antenna tuner is improperly matched to

the operating frequency when manual

tuning is selected.

• CW or RTTY mode is selected for voice

transmission.

• Wrong type of mode (emission) is se-

lected.

• Microphone is too close to your mouth.

• The dial lock function is activated.

• A quick set mode is selected.

• Re-connect the DC power cable correctly.

• Check for the cause, then replace the fuse

with the spare one.

(Fuses are installed in the DC power cable

and the internal PA unit.)

• Rotate [AF] clockwise to obtain a suitable

listening level.

• Turn [RF/SQL] to the position which opens

the squelch.

• Check the SEND line of an external unit,

if desired.

• Re-connect to the antenna connector.

• Push [TUNE] to tune the connected an-

tenna tuner.

• Set the proper condition for the connected

tuner.

• Push [ATT] to turn the attenuator OFF.

• Push [MODE] to select the proper operat-

ing mode (emission).

• Push [NB] to turn the noise blanker OFF.

• Adjust the [RIT] control to receive proper

audio output.

• Push [TUNE] to tune the connected an-

tenna tuner.

• Push [MODE] to select USB, LSB, or AM

mode.

• Push [MODE] to select the proper operat-

ing mode (emission).

• Speak into the microphone naturally and

do not hold the microphone too close to

your mouth.

• Push [LOCK] to turn the lock function

OFF.

• Push [SET] to exit the quick set mode.

p. 10

p. 40

p. 15

p. 5

p. 9

p. 18

p. 32

p. 19

p. 15

p. 19

p. 18

p. 15

p. 14

p. 28

CIRCUITRY FUSE REPLACEMENT

The 13.8 V DC from the DC power cable is applied to

all units in the IC-78 through the circuitry fuse. This

fuse is installed in the MAIN unit.

q Remove the top cover as shown on p. 48

w Replace the circuitry fuse as shown in the diagram

at right.

e Replace the top cover.

FGB 4 A

PA unit

■ Fuse replacement

If a fuse blows or the transceiver stops functioning, try

to ﬁnd the source of the problem, and replace the dam-

aged fuse with a new, rated fuse.

CAUTION:DISCONNECT the DC power cable

from the transceiver when changing a fuse.

The IC-78 has 2 types of fuses installed for transceiver

protection.

•DC power cable fuses ................................FGB 20 A

•Circuitry fuse ................................................FGB 4 A

DC POWER CABLE FUSE REPLACEMENT

20 A

fuse

■ Resetting the CPU

Returns programmed values in both

quick

and

ini-

tial set mode

to their defaults.

When ﬁrst applying power or when the function seems

to be displaying erroneous information, reset the CPU

as follows:

q Make sure transceiver power is OFF.

w While pushing [UPY] and [Z DN], push [PWR] to

turn power ON.

•The internal CPU is reset.

[PWR]

[√][∫]

MAINTENANCE

REMOTE JACK INFORMATION

•CI-V connection example

The transceiver can be connected through an optional

CT-17 CI-V LEVEL CONVERTER to a personal computer

equipped with an RS-232C port. The Icom Communi-

cations Interface-V (CI-V) controls the following func-

tions of the transceiver.

Up to 4 Icom CI-V transceivers or receivers can be

connected to a personal computer equipped with an

RS-232C port. See p. 32 for setting the CI-V condition

using set mode.

•Data format

The CI-V system can be operated using the following

data formats. Data formats differ according to com-

mand numbers. A data area or sub command is added

for some commands.

CONTROLLER TO IC-78

FE 62 E0 Cn Sc Data area FD

Preamble code (fixed)

Transceiver’s default address

Controller’s default address

Command number

(see table at right)

Sub command number

(see table at right)

BCD code data for frequency or

memory number entry

End of message code (fixed)

OK MESSAGE TO CONTROLLER

FE FE E0 62 FB FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

OK code (fixed)

End of message code (fixed)

NG MESSAGE TO CONTROLLER

FE FE E0 62 FA FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

NG code (fixed)

End of message code (fixed)

IC-78 TO CONTROLLER

FE E0 62 Cn Sc Data area FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

Command number

(see table at right)

Sub command number

(see table at right)

BCD code data for frequency or

memory number entry

End of message code (fixed)

qwert y u

■ CI-V remote control

9–15 V DC

personal

computer

ct- 17

BC-25

(optional)

mini-plug cable

IC-78

CONTROL COMMAND

•Command table

Command Sub command Description

00 — Send frequency data

01 — Send mode data

02 — Read Upper/Lower frequencies

03 — Read frequencies

04 — Read operating mode

05 — Set operating frequency

06 — Set mode

— Set memory

— Set memory channel

00 Scan stop

01 Memory scan start

11 — ATT

01 AF gain

14 02 RF gain

03 Squelch level

01 Read squelch Open/Close

02 Read S-meter level

02 PREAMP

16 22 Noise blanker

44 Microphone compressor

19 00 Read ID

■ Data cloning between transceivers

•Data cloning

The IC-78’s data (programmed frequencies, channel comment, both quick and initial set mode conditions, etc.) can

be copied to the other IC-78. This function is useful when exactly the same setting of the IC-78s is required.

•Cloning operation

q Turn power OFF.

w Connects a mini-plug cable between two IC-78’s

(master and sub) [REMOTE] jack.

e While pushing [TXF] and [FC], turn the master IC-

78 power ON.

r While pushing [SET] and [FC], turn the sub IC-78

power ON.

t Push [TONE] of the master IC-78 to start cloning.

• After cloning complete;

y Turn power OFF

Master transceiver

indicates “M”.

[REMOTE] jack

Mini-plug cableto [REMOTE]

to other IC-78’s

[REMOTE]

Master transceiver

indication

Daughter transceiver

indication

Daughter transceiver

indication

SPECIFICATIONS

■ GENERAL

•Frequency range :

Rx 0.030000–29.999999 MHz*

Tx 1.600000–29.999999 MHz*

Guaranteed range: 0.5–29.999999 MHz

Not guaranteed for some frequency bands

• Mode : USB, LSB, CW, RTTY, AM

• No. of memory channels : 99 (Duplex) +1 call

• Frequency stability :

Less than ±200 Hz from 1 min. to 60 min. after

power ON. After that rate of stability less than

±30 Hz/hr. at +25˚C (+77˚F). Temperature ﬂuctua-

tions 0˚C to +50˚C (+32˚F to +122˚F) less than

±350 Hz

•

Power supply requirement

(negative ground)

13.8 V DC ±15 %

• Current drain (at 13.8 V DC):

Receive Stand-by 1.3 A

max. audio 2.0 A

Transmit max. power 20.0 A

• Operating temp. range: –10˚C to +60˚C

; +14˚F to +140˚F

• Antenna connector : SO-239 (50 Ω)

• Dimensions : 240(W)×95(H)×239(D) mm

(projections not included)

⁄16(W)

⁄4(H)

⁄32(D) in

• Weight (approx.) : 3.8 kg; 8 lb 6 oz

• ACC connector : 13-pin

■ TRANSMITTER

• Modulation system :

SSB Balanced modulation

AM Low level modulation

• Output power :

SSB, CW, RTTY 2–100 W

AM 2–40 W

• Spurious emissions : Less than –46 dB below peak

output power

• Carrier suppression : More than 40 dB

• Unwanted sideband : More than 50 dB

• Microphone connector: 8-pin connector (600 Ω)

■ RECEIVER

•Receiver system : Double-conversion

superheterodyne

• Sensitivity (10 dB S/N) :

SSB, CW, RTTY

0.16 µV (1.600–29.999999 MHz)

(0.5 µV at 12 dB SINAD)

AM 13 µV (0.5–1.599999 MHz)

2 µV (1.600–29.999999 MHz)

• Selectivity :

SSB, CW, RTTY More than 2.1 kHz/–6 dB

Less than 4.5 kHz/–60 dB

AM More than 6.0 kHz/–6 dB

Less than 20 kHz/–40 dB

• Spurious and image rejection ratio:

(1.600–29.999999 MHz) More than 70 dB

• Audio output power : More than 2.0 W at 10%

(at 13.8 V DC) distortion with an 8 Ω load

•RIT variable range : ±1200 Hz

•PHONES connector : 3-conductor 6.5 (d) mm

(

⁄4″)

•Ext. SP connector : 2-conductor 3.5 (d) mm

(

⁄8″)

8 Ω

All stated speciﬁcations are typical and subject to

change without notice or obligation.

SP-7 EXTERNAL SPEAKER

Compact speaker for base station op-

eration. Height can be adjusted for

your convenience.

FL-52A, FL-53A, FL-96, FL-222

and FL-257 455 KHz FILTERS

• FL-52A: 500 Hz/-6dB

(CW/RTTY narrow)

• FL-53A: 250 Hz/-6dB (CW narrow)

• FL-96: 2.8 KHz/-6dB (SSB wide)

• FL-222: 1.8 KHz/-6dB (SSB narrow)

• FL-257: 3.3 KHz/-6dB (SSB wide)

CR-338 HIGH-STABILITY

CRYSTAL UNIT

Contains a temperature-compensat-

ing oven heater and crystal unit for

improved frequency stability.

•Frequency stability:±0.5 ppm

AH-710 FOLDED DIPOLE

ANTENNA

Covers from 1.9–30 MHz bands. Has

an SO-239 connector. 30 m (98.4 ft)

coaxial cable with PL-259 connector

is supplied.

approx. 24.5 m; 80.3 ft

OPTIONS

AH-4 AUTOMATIC ANTENNA

TUNER

Specially designed to tune a long wire

antenna for portable or mobile HF op-

eration. The PTT tuner start function

provides simple operation.

•Input power rating: 120 W

SP-20 EXTERNAL SPEAKER

4 audio filters; headphone jack; can

connect to 2 transceivers.

•Input impedance: 8 Ω

•Max. input power: 5 W

AH-2b ANTENNA ELEMENT

A 2.5 m long an-

tenna element for

mobile operation

with the AH-4.

•Frequency

coverage:

3.5–28 MHz

bands with the

AH-4

PS-85 DC POWER SUPPLY

Light weight switching regulator sys-

tem power supply.

• Output voltage: 13.8 V DC

• Max. current drain: 20 A

SP-21 EXTERNAL SPEAKER

Designed for base station operation.

Input impedance: 8 Ω

Max. input power: 5 W

AT-130/E AUTOMATIC

ANTENNA TUNER

Matches the transceiver to a long wire

antenna with a minimum of insertion

loss.

MN-100 ANTENNA MATCHER

Match the transceiver to a dipole an-

tenna. Covers all HF bands from 1.5

to 30 MHz. 8 m×2 antenna wires

comes attached.

MN-100L ANTENNA MATCHER

Match the transceiver to a long wire

antenna. Covers all HF bands from

1.5 to 30 MHz. 15 m×1 antenna wire

comes attached.

OPTIONS

CT-17 CI-V LEVEL CONVERTER

For remote transceiver control using a

personal computer. You can change

frequencies, operating mode, memory

channels, etc.

OPC-420 4-CONDUCTOR SHIELD CABLE

For the connection between transceiver and antenna tuner.

Compatible with the control cable, that is supplied with the

AT-120, AT-130 and AH-4. Cable length: 10 m (32.8 ft)

OPC-599 ADAPTER CABLE

13-pin, ACC connector to 7-pin + 8-pin ACC connector.

MB-23 CARRYING HANDLE

Carrying handle, convenient for

portable operation.

IC-MB5 MOBILE MOUNTING

BRACKET

Transceiver mounting bracket for mo-

bile operation.

HM-36 HAND MICROPHONE

Hand microphone equipped with

[UP]/[DOWN] switches.

Same as supplied.

SM-8 DESKTOP MICROPHONE

Including 2 connection cables for si-

multaneous connection of 2 trans-

ceivers. Has [UP]/[DOWN] switches.

SM-20 DESKTOP MICROPHONE

Unidirectional, electret microphone for

base station operation. Includes

[UP]/[DOWN] switches and a low cut

function.

SM-6 DESKTOP MICROPHONE

Electret condenser-type desktop mi-

crophone.

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan

A-5658H-1EX-w

Printed in Japan

Icom IC-78 Handleiding

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