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VL-1000

PERATINGPERATING

PERATING

M M

ANUALANUAL

ANUAL

VERTEX STANDARD CO., LTD.

4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan

VERTEX STANDARD U.S.A. Inc.

6125 Phyllis Drive, Cypress, California 90630, U.S.A.

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close

Winchester, Hampshire, SO23 0LB, U.K.

VERTEX STANDARD HK LTD.

Unit 1306-1308, 13F., Millennium City 2, 378 Kwun Tong Road,

Kwun Tong, Kowloon, Hong Kong

VERTEX STANDARD

(

AUSTRALIA

)

PTY., LTD.

Tally Ho Business Park, 10 Wesley Court, East Burwood, VIC, 3151

Page 1VL-1000 Operating Manual

General Description

Congratulations! You are now the owner of the Yaesu VL-1000 Linear Amplifier, which brings

you leading-edge technology for the ultimate in operating convenience and reliability. We appreci-

ate your investment in Yaesu equipment, and wish you many years of satisfying operation using

your new amplifier!

The VL-1000 is an all-solid-state linear amplifier operating on the 160 through 6 meter amateur

bands (USA version: 160-15 meters) at a power output level of 1000 Watts on CW and SSB (500

Watts on continuous data modes such as RTTY). The VL-1000 includes a built-in antenna tuner

with 240 memories for tuning data, and microprocessor control of the tuning circuitry. The VL-1000

features input jacks for two different exciters, as well as four antenna jacks for connection of

antennas for different bands. Extensive self-test, system monitoring, and protection circuits are

provided, with status and tuning information being displayed on a huge Liquid Crystal Display

panel.

The separate VP-1000 Power Supply Unit provides the +48 Volts required by the PA transis-

tors, as well as all required control voltages for the amplifier. The VL-1000 normally is powered via

220 Volt AC mains, although it can be operated, at the 500 Watt level, from 117 Volt AC power.

We encourage you to read this manual thoroughly before beginning installation and operation

of your VL-1000 Linear Amplifier. The details regarding proper installation and operating advice

contained in these pages will help you derive maximum satisfaction from your new Yaesu equip-

ment. Be certain to observe all due safety precautions when using this high-power device!

Supplied Accessories

Item Quantity

ALC Cable (T9101489; 2 m) 1

Band Data Cable (T9101487A; 8-pin DIN  8-pin DIN, 2 m) 1

Control Cable (T9101491; D-sub 15-pin  RCA, 2 m) 1

Page 2 VL-1000 Operating Manual

Installation

The proper, safe installation of the VL-1000

is not difficult to accomplish, using the guide-

lines to follow.

Caution!

Lethal AC and RF voltages are present

within the cabinets of the VL-1000 Lin-

ear Amplifier and VP-1000 Power Sup-

ply. Use extreme caution when open-

ing the cabinet(s) to perform any

alignment or adjustment steps, and

take particular care to inspect inter-

connection cables frequently to en-

sure that they are in good condition.

It is assumed that you possess tech-

nical knowledge and experience con-

sistent with your possession of an

amateur radio license; this knowledge

and experience are important tools

which will aid in the successful instal-

lation of this apparatus. Should you

have any questions about the safe in-

stallation of this equipment, consult

your Yaesu dealer or seek the assis-

tance of a professional installer.

AC Power Connections

(using VP-1000 Power Supply)

The VL-1000 is usually operated from 220

Volt (nominal) AC power. With 220 Volt input

to the VP-1000 Power Supply, full (1000 W)

power output will be obtained from the VL-

1000, while 117 Volt input to the VP-1000 is

possible at the 500 Watt power output level.

The advanced switching-regulator power

supply used in the matching VP-1000 Power

Supply does not require any transformer re-

wiring, nor any changing of a switch position;

the power supply will operate from either 220

or 117 Volt line voltages without configuration

changes.

However, the AC power cable/plug configu-

ration will be somewhat different, depending

on the country in which you purchased your

amplifier. In some countries, the VP-1000 is

shipped with the standard 220 Volt connector

appropriate for your location. In those areas

where there are multiple 220 Volt connectors

in common use, the VP-1000 is shipped with-

out the power connector; one may be obtained

at a local hardware or electrical supply store.

Pictorial diagrams of the common 220 and

117 Volt AC connectors in use are shown be-

low. When wiring your own connector, be ab-

solutely certain to observe the proper polarity

on the pin connections. Consult with an elec-

trician if you have any doubts about your wir-

ing!

Be sure that your house wiring is capable

of sufficient current capacity on the 220 Volt

circuit to be used, especially if this circuit is

shared with household appliances. It always

is preferable to operate the VL-1000 from a

dedicated 220 Volt circuit with its own circuit

breaker.

Transceiver or Exciter

Interconnections

The interface wiring to the transceiver or trans-

mitter which drives the VL-1000 consists of:

(A) A 50 Ω coaxial cable for carrying RF drive

power from each exciter to the amplifier;

(B) A 2-conductor transmit/receive control

cable which provides a closure to ground

signal from the transceiver to the amplifier

during transmission;

Level Control) line, used to limit the drive

level from the exciter to the amplifier; and

(D) When using a compatible Yaesu trans-

UK Plug Australian

Plug

European

Plug

USA

Plug

(viewed from plug prong side)

VP-1000 AC Cable wiring

(European version)

(U.S.A version)

Page 3VL-1000 Operating Manual

Installation

FT-920/VL-1000

FT-1000MP/FT-650/VL-1000

nected to the INPUT 1/PTT 1/ALC 1 jacks, and

that all cables from exciter #2 are connected

to the INPUT 2/PTT 2/ALC 2 jacks. When us-

ing a B

AND DATA cable for interconnection, you

do not need the PTT cable for the correspond-

ing exciter, as the T/R control signal will be

made via the B

AND DATA cable.

ceiver, a B

AND DATA cable may be con-

nected which provides automatic band

change and T/R control (thus eliminating

the need for cable (B) above), and +48 V

DC supply voltage On/Off control (if the

REMOTE switch on the rear panel of the

VL-1000 is set to the ON position).

Typical installation diagrams are shown

below. When two exciters are utilized, be cer-

tain that all the cables from exciter #1 are con-

Page 4 VL-1000 Operating Manual

connections labeled TX GND on the rear panel

of the transceiver; do not, however, use the

transceiver’s P

TT jack, as it was designed for

PTT input (via a footswitch, etc.), not for am-

plifier control.

Automatic Amplifier Tune-Up

If you connect the supplied control cable be-

tween the transceiver’s P

TT or REMOTE jack and

the VL-1000’s BAND-DATA 2 jack, the trans-

ceiver will automatically transmit when you

press the amplifier’s front panel F SET key

(make sure that the M

ODE switch of the trans-

ceiver is set to CW, RTTY, or some other con-

tinuous mode, and set the D

RIVE or RF PWR

control fully clockwise, if you want to perform

antenna tuning). To accomplish this function,

pin 11 of the BAND-DATA 2 jack closes the

transceiver’s P

TT or REMOTE jack to ground, thus

placing the transceiver in the transmit condi-

tion.

Automatic Amplifier Tune-Up

using FT-1000MP Transceiver

When using the VL-1000 in conjunction with

the FT-1000MP transceiver, the front panel F

SET key may be used to initiate an automatic

tuning procedure for the amplifier. In order to

accomplish this, Menu Item 7-9 on the FT-

1000MP must be set to “KEYER ” (which is its

default value), and a control cable must be con-

nected between the FT-1000MP’s R

EMOTE jack

and the VL-1000’s BAND-DATA 2 jack. The

required wiring for this cable is shown below.

Installation

Antenna Connections

As many as four HF or 50 MHz antennas

may be connected to the rear panel Antenna

jacks, labeled ANT 1 ~ ANT 4. The antenna to

be used on a particular band will be memo-

rized once you make the selection manually

via the front panel ANT switch. See the “Op-

eration” section of this manual for more de-

tails.

ALC Connections

The VL-1000 provides negative-going ALC,

which provides a negative voltage to the ex-

citer which begins to appear when sufficient

drive power from the exciter is being received;

the voltage becomes of greater (negative)

magnitude if the drive is increased, so as to

prevent overdrive of the amplifier. The voltage

range provided from the VL-1000 is 0 to 10

Volts DC, and this is compatible with all Yaesu

transceivers as well as many exciters of other

manufacture. At 1000 Watts of output power,

the typical voltage generated for use with

Yaesu transceivers is about 4 V DC.

The ALC cable must be connected between

the transceiver and VL-1000 to prevent over-

drive of the amplifier, and especially to facili-

tate the proper operation of the protection cir-

cuitry if sudden antenna system problems

should cause the SWR to rise to dangerous

levels.

PTT Connections

These jacks, labeled PTT 1 and PTT 2, ac-

cept T/R control signals from your exciter.

Grounding the center pin of one of these PTT

jacks will cause the amplifier to be placed in

the “Transmit” mode.

These jacks utilize a positive voltage (5V

DC) at very low current (10 mA maximum), so

they are compatible with most open-collector

NPN transistor amplifier control circuits in mod-

ern transceivers. Mechanical relays may also

be used, so long as they are “floating” con-

tacts that do not apply a voltage to the VL-

1000’s PTT jacks. On Yaesu transceivers, use

either the transistor or relay (Normally Open)

Page 5VL-1000 Operating Manual

Plug Pinout

as viewed from rear panel as viewed from rear panel

as viewed from rear panel

BAND-DATA 1 CONTROL

BAND-DATA 2 DC48V IN

+13.5 V

TX GND

GND

BAND DATA A

BAND DATA B

BAND DATA C

BAND DATA D

TX INH

GND

REMOTE

PS ALARM

LOW POWER

GND

-12V INPUT

+12V INPUT

+48V INPUT

GND

+13.5 V

TX GND

GND

BAND DATA A

BAND DATA B

BAND DATA C

BAND DATA D

TX INH

F SET COMMON

F SET 1

F SET 2

GND

RCA Plug

GND or (-)

SIGNAL or (+)

Page 6 VL-1000 Operating Manual

4. LOW Switch

This switch selects the RF output power.

When in the LOW position, the RF output

power will be reduced to (approximately) 500

watts PEP, and “

LOWLOW

LOW” will appear on the dis-

play.

Note: This switch should be set to the LOW

position when operating from a 100 ~ 117 VAC

power source.

5. INPUT Switch

Press this switch to toggle between the ex-

citers connected to the INPUT 1 and INPUT 2

connectors on the rear panel. The indicator

“

INPUT 1INPUT 1

INPUT 1” or “

INPUT 2INPUT 2

INPUT 2” will appear on the dis-

play to indicate which exciter is in use.

6. ATT Switch

This switch activates a 3 dB input RF power

attenuator, to reduce excessive input power

from the exciter. It should be on if exciter out-

put exceeds 100 watts PEP, as is the case

when using the FT-1000/D. The “

ATTATT

ATT” indica-

tor will appear on the display when this switch

is on.

Front Panel Controls and Switches

1. POWER Switch

This switch turns the VL-1000 on and off.

When the amplifier is turned off, the INPUT 1

jack is connected directly to the ANT 1 jack. If

using a Yaesu transceiver with a B

AND DATA

cable, the VL-1000 AC power will be remotely

controlled by the transceiver’s power switch

when the REMOTE switch on the rear panel

of the VL-1000 is set to ON.

2. OPERATE Switch

Pressing this switch activates the power am-

plifier section of the VL-1000. When the power

amplifier is activated, “

OPERATEOPERATE

OPERATE” will appear

on the display. Press this switch again to turn

off the power amplifier section.

3. DIM Switch

This switch selects the brightness level of

the LCD display. In low-light situations, acti-

vating the Dimmer may reduce excess bright-

ness in the display. For normal room lighting,

however, the Dimmer should be set to OFF for

best visibility.

Page 7VL-1000 Operating Manual

When using the Grapfical SWR Meter dis-

play, press and hold this switch for ½ second

to change the frequency span of the meter.

11. TUNER Switch

Pressing this switch places the antenna

tuner in the transmit signal path. When the

antenna tuner is activated, the “

TUNERTUNER

TUNER” indi-

cator appears on the display. Press this switch

again to turn off the antenna tuner.

12. TUNE Switch

This switch activates the auto-tune system

manually. Normally, when the operating band

is changed, the tuner will automatically adjust

itself for the same antenna selection and

matching impedance which was set the last

time that band was used. Press this switch to

retune if you are on a different part of the band,

or if the SWR is still too high after automatic

tuning. Manual-restart with this switch can be

used to “force” rematching of the impedance

presented by the antenna system at any time.

13. F SET Switch

Press this switch to activate the exciter and

tune up the VL-1000 automatically when us-

ing the FT-1000MP (with the cable shown on

page 4 connected between the BAND DATA

2 jack on the VL-1000 and R

EMOTE jack on the

FT-1000MP).

14. CONTRAST Knob

This knob used to adjust the LCD contrast.

15. LCD Display

The upper half of the display consists a 320

x 60 dot-matrix display showing operating sta-

tus of the VL-1000, including the Graphical

SWR meter. The lower half contains various

icons representing enabled features.

Front Panel Controls and Switches

7. ANT Switch

This switch can be used for manual selec-

tion of up to four antennas. The antenna se-

lection is stored in memory, so once selected

and matched on a particular band, the same

antenna will be reselected automatically when

recalling that band. One of the indicators “

ANTANT

ANT

1” to “

ANT 4ANT 4

ANT 4” will appear on the display to indi-

cate which antenna is in use.

8. DISPLAY 1 Switch

Press and hold this switch for ½ second to

copy the current display into Display Memory

#1. Press this switch momentarily to recall the

Display Memory 1 data to the display. This

switch is also used for alignment of the ALC

system, if needed.

9. DISPLAY 2 Switch

Press and hold this switch for ½ second to

copy the current display into Display Memory

#2. Press this switch momentarily to recall the

Display Memory 2 data to the display. This

switch is also used for alignment of the ALC

system, if needed.

10. DISPLAY SELECT Switch

This switch is used to select the display

function, with the selections being provided in

the following sequence:

Multi Meter 1



Multi Meter 2



PO Meter 1



PO Meter 2



Graphical SWR Meter



Multi Meter 1



Page 8 VL-1000 Operating Manual

5. PTT Jacks

Shorting the center pins of these jacks to

ground activates the amplifier for transmission.

This function will normally be provided by am-

plifier control contacts in the T/R relay (or open-

collector NPN transistor) in the exciter. Open

circuit voltage at this PTT jack is 5V DC, and

maximum closed circuit current required is 10

mA.

6. ALC Jacks

These RCA jacks provide the ALC (output)

voltage for control of the exciter’s RF drive

level. The ALC control voltage range is 0 to

10 VDC.

7. GND Terminal Post

Connect this terminal to a good earth ground

using the shortest practical length of heavy

braided cable. All other station equipment

should be grounded to the same ground sys-

tem.

1. ANTENNA Jacks

Connect these type M (SO-239) jacks to

your antennas using large (RG-213 or larger)

50 Ω impedance coaxial cable with mating

plugs (Type M/PL-259).

2. REMOTE Switch

When this switch is in the ON position, the

VP-1000’s +48V DC supply voltage will be con-

trolled by the transceiver’s power switch if you

are using a Yaesu transceiver with a B

AND DATA

cable.

3. BAND-DATA 1 Jack

This 8-pin DIN jack provides for a supplied

control cable for the Yaesu transceivers, to al-

low automatic band selection, T/R control, and

power on/off control.

4. BAND-DATA 2 Jack

This D-sub 15-pin jack provides the same

connections as does the BAND-DATA 1 Jack,

plus additional connections for special appli-

cations.

Rear Panel Connectors and Switch

Page 9VL-1000 Operating Manual

8. INPUT Jacks

These type M (SO-239) jacks should be

connected through a short 50 Ω coaxial jumper

to the (transmitting) antenna jack of the trans-

ceivers.

9. CONTROL Socket

Connect this 8-pin Molex socket to the CON-

TROL socket on the Yaesu VP-1000 AC Power

Supply. This socket provides ±12V DC and

control signals for the VL-1000.

10. DC48V IN Jack

Connect this 8-pin Molex socket to the OUT-

PUT socket on the Yaesu VP-1000 AC Power

Supply. This socket provides +48V DC sup-

ply voltage for the power amplifier of the VL-

1000.

Rear Panel Connectors and Switch

Operating Advice

For most operating situations, the REMOTE switch on the rear panel of the VL-1000 should

be set to the “Off ” position (unless you have connected an appropriate B

AND DATA cable for

remote power control). Before commencing initial checkout, verify that the R

EMOTE switch is

OFF.

If the REMOTE switch is on, and the VL-1000 is not connected to a Yaesu transceiver

providing remote power actuation, Error Message #1005 (which warns of “Excessive PA DC

Voltage”) will appear following the “Self Test” procedure. If you experience this situation,

check to be sure that the R

EMOTE switch has not accidentally been turned on.

Page 10 VL-1000 Operating Manual

Operation

Preliminary Checks

Before switching on power, recheck all in-

terconnections. Be certain that the ground, RF

input, and ALC connection cables are all se-

cure.

If using a Yaesu FT-980 transceiver for ex-

citation, set the L

IN AMP switch on the rear panel

to the (upper) Position 1. If using an FT-

757GX(II) or FT-767GX, ensure that the L

IN or

INEAR switch is depressed (Position 1). Other

Yaesu transceivers do not require special

switch setting on the transceiver prior to com-

mencing amplifier operation

Band Changes

By now, you have noticed that there is no

“B

AND” switch on the VL-1000. Selection of the

frequency band is accomplished in one of two

ways:



If using a Yaesu transceiver with a BAND

DATA control cable, band selection and an-

tenna rematching will occur automatically

whenever you change bands on the trans-

ceiver. Similarly, the antenna last used by

the VL-1000 on each band will be reselected

when that band is recalled on the trans-

ceiver.



If you are using a transceiver without a band

control cable, injecting a carrier from the

exciter for few seconds causes the VL-

1000’s microprocessor to count the input

frequency and automatically set the ampli-

fier up for operation on the appropriate band.

Here are the appropriate procedures:

1. Set the M

ODE switch of the exciter to CW,

and the D

RIVE or RF PWR control of the

exciter so as to provide 50 Watts of less

of drive power to the VL-1000.

2. Press the F SET key on the VL-1000 mo-

mentarily, then press the P

TT switch of

the exciter to activate the transmitter. If

necessary, close your key to allow a car-

rier to be transmitted for a few seconds.

3. The microprocessor of the VL-1000 will

now detect the frequency of the input sig-

nal, and the amplifier will then set itself

to the matching band.

4. When the correct band appears on the

VL-1000 display, release the exciter’s

TT switch so as to return to the receive

mode. Preliminary band setup is now

complete.

If you attempt to transmit on an improper

band (for example, at 6.2 MHz), the VL-1000

will automatically be placed in the “THRU”

mode, and no amplification will take place.

Antenna Selection

Pressing the ANT switch repeatedly causes

the VL-1000 to “toggle” between the rear panel

antenna jacks. Just remember to select the

correct antenna when making band changes

during initial operation, and the VL-1000 will

thereafter remember which of ANT 1 through

ANT 4 should be selected when you return to

that band.

When the amplifier is turned off, the default

antenna selection is ANT 1. You may wish to

consider putting a grounding-type coaxial

switch in the coaxial line connected to the ANT

1 jack, so as to shunt static electricity or nearby

lightning pulses to ground.

Fan Operation

The cooling fans for the amplifier and power

supply are both thermostatically controlled. The

thermostats are set to activate well before “dan-

gerous” heat has built up inside the cabinets.

It is quite normal for the fans to cycle on and

off, occasionally, even during receive opera-

tion. The fans also may continue to operate

after the front panel power switch is turned off,

this feature allows the complete dissipation of

heat so as to ensure long life of the compo-

nents.

Important Note

The VL-1000 requires input drive power of

50~60 watts. Please ensure that the trans-

mitter used with this amplifier is capable of

producing at least 60 Watts of drive power

so as to ensure full output from the VL-1000.

When driving the VL-1000 with a transceiver

which includes a built-in antenna tuner,

please turn the transceiver’s antenna tuner

off when using the VL-1000.

Page 11VL-1000 Operating Manual

PO Meter 2:

 Peak Power Output Bar Graph (large) with

Peak-hold Segment

 Peak and Average Power Output Numeric

Displays

 SWR Numeric Display

 Current TX/RX Status

 Current Frequency Band (Numeric Display)

Antenna Tuning Meter:

 Current (changing) SWR Bar Graph

 Pictorial display of relative positions of An-

tenna Tuner Variable Capacitors

 Current Frequency Band (Numeric Display)

Graphical SWR Meter:



Current Antenna Jack in Use (ANT 1 ~ ANT

 Display of “TUNER OUT” SWR (Dots on Graph)

 Display of “TUNER IN” SWR (Dashes on

Graph, this indicator does not indicate when

SWR is above 1.5:1.)

 Current Frequency Band (Numeric Display)

 User-Defined Span on Band Display



1.8 ~ 14 MHz: 100/500/1000 kHz (selectable)



14 ~ 28 MHz: 500/1000 kHz (selectable)



28 ~ 54 MHz: 1000 kHz (fixed)

Initial Amplifier

SELF-TEST Protocol

When the VL-1000 is initially turned on, it

enters a “S

ELF -TEST” mode, in which the

amplifier’s microprocessor checks various as-

pects of its control signals and supply voltages.

If the amplifier’s self-test routine is success-

fully completed, the following display will be

shown:

Operation

Metering

An extensive array of metering selections

are available to the owner of the VL-1000.

Pressing the DISPLAY SELECT switch allows

you to choose from among these options.

Multi Meter 1:

 Peak and Average Power Output Bar Graphs

 Peak and Average Power Output Numeric

Displays

 PA Drain Current Bar Graph

PA Drain Voltage Bar Graph

 Current TX/RX Status

 SWR Numeric Display

 Current Frequency Band (Numeric Display)

Multi Meter 2:

 Peak and Average Power Output Bar Graphs

 Peak and Average Power Output Numeric

Displays

 PA Drain Current Bar Graph

 Current TX/RX Status

 SWR Bar Graph

 SWR Numeric Display

 Current Frequency Band (Numeric Display)

PO Meter 1:

 Peak and Average Power Output Bar Graphs

with Peak-hold Segment

 Peak and Average Power Output Numeric

Displays

 SWR Numeric Display

 Current TX/RX Status

 Current Frequency Band (Numeric Display)

Page 12 VL-1000 Operating Manual

Drive Power Check

If this is first-time operation, or whenever

using a different exciter (transceiver), perform

this procedure to check peak exciter driving

power.

 Turn the VL-1000 POWER switch on by

pressing the switch in.

 Make sure that the OPERATE and TUNER

switches on the VL-1000 are both off.

 Connect a 100-watt dummy load to the ANT

1 jack on the VL-1000, if available. If a

dummy load is not available, connect an

antenna which presents a 50 Ω resistive

load to the ANT 1 jack. Tune your exciter to

a clear frequency.

 Set the transceiver to the CW mode, and

preset the D

RIVE or RF PWR control on the

transceiver fully clockwise (maximum).

 Briefly key the transmitter, while watching

the display of the VL-1000. If the (indicated)

exciter power is above 100 watts, turn the

ATT switch ON. Never press the ATT

switch while transmitting.

Drive power must be at least 50 watts for

accurate SWR detection, and 70 to 80 watts

for optimum tuner performance. Full power

output will be obtained from the VL-1000 when

the drive power is between 50 and 80 watts,

depending on the band in use. When the VL-

1000 power amplifier section is activated, ALC

voltage is fed back from the amplifier to the

transmitter, to reduce power output to this level.

However, much higher drive power to the am-

plifier will cause the protective circuitry to dis-

able the amplifier (to avoid damage to the in-

put circuits). Therefore, when using an exciter

delivering more than 100 Watts of drive power,

the input attenuator should be used. With

Yaesu transceivers, only the FT-1000/D series

should require the use of the attenuator, as

the FT-1000/D is capable of up to 200 Watts

of output power.

ALC Alignment

When this amplifier is used with Yaesu

transceivers such as the FT-1000MP, FT-990,

or FT-920, the ALC system normally will not

require alignment. However, if it appears that

full power is not being achieved due to exces-

sive ALC action, you may align your VL-1000’s

ALC system to that of your transceiver via this

simple procedure:

1. Connect the transceiver to the INPUT 1

jack, and select “INPUT 1” via the front

panel INPUT switch.

2. Set the RF output power to the HIGH

power condition via the front panel LOW

switch.

3. Press the TUNER switch to turn off the an-

tenna tuner (“TUNER” indicator will be

OFF).

4. Press and hold in the INPUT switch for ½

second; this initiates the “ALC Alignment”

mode.

5. Start with the transceiver’s D

RIVE or RF PWR

control fully counter-clockwise, then rotate

the D

RIVE or RF PWR control to the fully

clockwise position while transmitting.

6. If the power output from the amplifier (as

displayed on the AVG meter) does not

reach 1000W because of the effect of the

VL-1000’s ALC voltage at full exciter drive,

keep the transceiver’s D

RIVE or RF PWR

control fully clockwise, then press and hold

in the DISPLAY 2 key until the power out-

put from the amplifier reaches 1000 Watts.

7. If, on the other hand, the ALC voltage from

the VL-1000 does not cause the exciter

drive to be controlled such that the power

output from the amplifier limits at 1000

Watts, do the reverse procedure from that

just described. First, reduce the drive from

the exciter until the VL-1000’s power out-

put is 1000 Watts. Next, press and hold in

the DISPLAY 1 key until the output power

from the amplifier is just reduced from the

1000 Watt level. Now set the transceiver’s

RIVE or RF PWR control fully clockwise, and

press the DISPLAY 1 key (to increase ALC

voltage/decrease power output) or DIS-

Operation

Page 13VL-1000 Operating Manual

PLAY 2 key (to decrease ALC voltage/in-

crease power output) until the power out-

put from the amplifier reaches 1000 Watts

(these tuning procedures should be as

short as possible).

8. Return the input transceiver to the receive

mode.

9. Press the LOW switch to select LOW

power operation.

10. Again transmit a carrier at full drive power;

press the DISPLAY 1 or the DISPLAY 2

key, as needed, until the power output from

the amplifier reaches 500 Watts. Now re-

turn the exciter to the receive mode.

11. Press and hold in the INPUT switch for ½

second to exit the ALC Alignment mode.

12. Press the TUNER switch to turn on the an-

tenna tuner (“TUNER” indicator will be ON).

13. Repeat steps 4 through 11.

14. You can align the ALC voltage of the trans-

ceiver that is connected to the INPUT 2

jack in the same way. First select “INPUT

2” via the front panel INPUT switch, then

follow the same procedure as described

above.

Initial Antenna Matching Procedure

 Briefly key the transmitter, while watching

the SWR indicator in the display of the VL-

1000 (SWR calculation is automatic, so no

full-scale presetting is necessary).

 If the SWR is above 1.5:1, activate the An-

tenna Tuning Unit to retune the impedance

presented by the antenna system, as follows;



Press the TUNER switch;



Press the TUNE switch;



Transmit a carrier from the exciter in the

CW or other continuous mode. Do not

attempt to perform antenna tuning by

whistling into the microphone in an SSB

mode, as the drive power delivered to

the antenna tuner’s microprocessor will

not be consistent.



During antenna tuning, a special Antenna

Tuning Meter display will be observed, show-

ing the progress of the SWR reduction as

well as showing a depiction of the relative

positions of the two Variable Capacitors in

the antenna tuner (VC-A and VC-B).

Operation

 At the completion of the tuning process,

“

COMPLETECOMPLETE

COMPLETE” will appear on the display.

Once tuning has been successfully com-

pleted, the display will shift to the Graphical

SWR Meter automatically. In this mode,

both the “before tuning” (THRU) and “after

tuning” (A/T) SWR conditions present at the

VL-1000’s current antenna jack will be

shown. As you move around the band, new

antenna tuning settings will be recorded on

the Graphical SWR Meter, giving you a clear

picture of the tuning action of the VL-1000’s

automatic antenna tuner.

 If “

COMPLETECOMPLETE

COMPLETE” does not appear, it means

that an excessively-high SWR exists on the

coaxial line; “

ERRORERROR

ERROR” will appear on the dis-

play, and either “

HI SWRHI SWR

HI SWR” or “

PROTECTPROTECT

PROTECT” will

come on to assist you in knowing the exact

nature of the fault. If either of these warn-

ing messages should appear on the display,

check the antenna, feedline, and antenna

connection.

 If “

COMPLETECOMPLETE

COMPLETE” appears after tuning, press

the OPERATE switch. The VL-1000 is now

ready for operation.

Note: During antenna tuning, the tuning car-

rier is passed through the power amplifier then

fed to a 20dB power attenuator circuit to mini-

mize interference to other operators; this power

reduction takes place even if the OPERATE

switch is on.

Page 14 VL-1000 Operating Manual

Operation

Linear Amplifier Operation

Although continuous full exciter power is re-

quired for accurate SWR measurement and an-

tenna matching, this will cause overheating if

transmitting for an extended period when OP-

ERATE switch is depressed (that is, when the

power amplifier section is on). So once the

antenna has been matched the first time, re-

duce the setting of the exciter’s D

RIVE or RF

PWR control if you contemplate operation us-

ing a continuous-carrier operating mode (see

the guidelines below).

For SSB and CW operation, make sure to

adjust the M

IC GAIN and/or DRIVE control on the

transceiver for proper ALC indication on the

transceiver ALC meter, as described in the

transceiver manual. Generally, for SSB, the

ALC meter indication should not deflect beyond

a certain ALC limit (the “ALC” zone on the

transceiver’s meter) on voice peaks; on CW,

the ALC indication should be just enough to

cause slight meter deflection. Higher ALC lev-

els may produce distortion or key clicks, with-

out producing any additional power output.

For FM, SSTV, RTTY, AMTOR or packet,

press the LOW switch to select the LOW power

condition to prevent the overheating during

continuous operation for extended periods.

For AM operation, adjust the D

RIVE or RF

PWR control on the transceiver so that the AVG

power meter on the VL-1000 does not exceed

250 watts when transmitting a carrier. On voice

peaks, adjust the M

IC GAIN control on the trans-

ceiver so that the PEAK power meter on the

VL-1000 does not exceed 1000 watts.

Operating Precautions

Summarized below are some precautions to adhere to in order to ensure long life and trouble-

free operation with the VL-1000.

 Do not transmit, after changing bands, until “

COMPLETECOMPLETE

COMPLETE” appears on the display.

 Do not transmit when turning the POWER switch or the ATT switch on or off.

 When changing bands, always make certain that the VL-1000 is set for the same band as

the transceiver before transmitting, and that the proper antenna is connected. Remem-

ber that ANT 1 is automatically selected when the VL-1000 is switched off.

 Reduce the drive power or shorten transmissions if Warning Message #1001 appears on

the display (see next page).

Beeper on/off

When you press a switch, the beeper pro-

vides useful audible feedback to confirm that

the switch was successfully activated.

If you want to turn the beeper off, first turn

the VL-1000 off, then press and hold in the

DISPLAY 1 and DISPLAY 2 switches while

you turn the VL-1000 on. To turn the beeper

back on again, repeat this switch-on procedure.

Resetting the CPU

The VL-1000 can be reset so as to clear all

settings, display memories, and antenna tuner

data; these will be reset to their factory defaults.

To reset the microprocessor, press and hold

in the OPERATE and DIM switches while you

turn the VL-1000 on.

Page 15VL-1000 Operating Manual

If one of these messages should appear, a potentially serious situation is being experienced.

Turn the amplifier off, correct the problem, then turn the amplifier back on. If the problem has,

indeed, been corrected, full operation at the 1000 Watt power level should be restored.



#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA

#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA

The Power amplifier heatsink is overheated.

Reduce the drive power or shorten transmis-

sions to cooling the heatsink.



#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1

#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1

The SWR is too high (above 3:1). Check the

antenna, feedline, and coaxial cable

connector(s).



#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE

#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE

More than 50 watts of imbalance has occurred

among the four sections of the power amplifier.

A transistor or LPF Unit power combiner failure

may be responsible.



#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER

#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER

The recommended drive level from the exciter

(transceiver) has been exceeded. Reduce the

drive level or set the ATT switch to the ON po-

sition.



#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE

#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE

The recommended Drain Voltage of the final

amplifier has been exceeded. Check the power

supply voltage regulator and associated cir-

cuitry.



#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT

#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT

The recommended Drain Current of the final

amplifier has been exceeded. Check the power

FETs and associated circuitry.



#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE

#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE

The VP-1000 or its interconnection to the VL-

1000 has failed. Check the cable connection

from the VL-1000 and/or the VP-1000. This

Warning only appears when using the Yaesu

VP-1000 power supply unit.



#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR

#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR

The VL-1000 and the transceiver are set up with

conflicting band selection, due to a logic error

in the Band Data matrix, a failure in the B

AND

DATA cable, or similar problem. The VL-1000 is

placed in the "Thru" mode automatically when

this occurs.

WARNING Messages

Page 16 VL-1000 Operating Manual

General

Frequency Coverage: 160 ~ 6 Meter Amateur Bands

(USA Version: 160 ~ 15, 6 Meter Amateur Bands)

Power Output: 1000 Watts @ 220V AC Input to VP-1000 Power Supply

Continuous Transmission Period: 100% @ 500 W for 1 hour

Case Size (WHD): 410 x 135 x 439 mm

Weight (Approx.): 21 kg

Supply Voltage: 48 VDC, 12 VDC, 12 VDC

Power Consumption (Max.): 48 A @ 48 VDC, 2.8 A @ 12 VDC, 0.1 A @ 12 VDC

Linear Amplifier Section

Excitation Power: 50 ~ 80 Watts

ALC Voltage (output) Range: 0 to 10 V (Nominal 4V @ 1000 W output)

Spurious Radiation: less than 50 dB @ 160 ~ 10 Meter Amateur Bands

less than 60 dB @ 6 Meter Amateur Band

Third-order IMD: less than 30 dB @ 1000 W PEP (Typical)

Input/Output Impedance: 50 Ω, unbalanced

Automatic Antenna Tuner Section

Impedance Matching Range: 16 to 100 Ω, unbalanced @ 160 Meter Amateur Band

16 to 150 Ω, unbalanced @ 80 ~ 10 Meter Amateur Bands

25 to 100 Ω, unbalanced @ 6 Meter Amateur Band

Frequency Range: 160 ~ 6 Meter Amateur Bands

Matching Time: less than 10 seconds

Matched SWR: 1.5:1 or better

Tuning Memory Register: 240 channels

Specifications are subject to change, in the interest of technical improvement, without nortice or oblogation.

Specifications

CAUTION!

Changes or modifications to this device not expressly approved by Yaesu

Musen could void the user’s authorization to operate this device.

VERTEX STANDARD CO., LTD.

No portion of this manual

may be reproduced without

the permission of

VERTEX STANDARD CO., LTD.

Printed in Japan.

E08971004

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