SETTINGS

CONNECTION

ADJUST

ADJUST FOR

Remove TP7-TP9 Jumper PCB.

CARRIER OSCILLATOR OFFSETS:
TX Mode
Freq. to Center freq.

Connect Frequency Counter to TP6 (top bare lead of R102).

L28

LSB/TX mode: Adjust for 10.6975MHz ±20Hz.

Connect Frequency Counter to TP6 (top bare lead of R102).

L27

USB/TX mode: Adjust for 10.6925MHz ±20 Hz.

Connect Frequency Counter to (top bare lead of R151).

L26

AM/TX mode: Adjust for 10.6950MHz ±20 Hz.

DRIVER BIAS:
Band Switch & Ch. Selector to center.
Mode to USB
MIKE GAIN at minimum.
Remove bias metering jumper

Connect DC Ampmeter between TP9 and TP8.

VR11

Key TX adjust for 50-75mA.

FINAL BIAS:
Band Switch & Ch. Selector to center.
Mode to USB
MIKE GAIN at minimum.

Connect DC Ammeter between TP9 and TP7.

VR10

VR20

Key TX & adjust VR10 & VR20 for minimum ( 0mA ) current. Next adjust VR10 for 50mA, then adjust VR20 for 100mA total.

Replace TP7-TP9 Jumper PCB.

RF AMP CHAIN:
Replace PCB shorting jumper.
Set mode to AM.
Set RF power switch to HI .

Connect wattmeter to ANT output.

L43, L44,
L42, L40.

Key TX & adjust (in order) for maximum RF output . Recheck power at lowest & highest channels; readjust if necessary for balance across entire bandwidth.

SSB CARRIER BALANCE:
Set mode to USB
MIKE GAIN to minimum.

Connect wattmeter to ANT output.

VR7

Key TX; adjust for min. carrier leak through on scope or wattmeter. Recheck on LSB mode. If necessary readjust for best balance of sideband suppression between LSB & USB

SSB ALC:
Mode to USB.
MIKE GAIN to maximum.
Inject two-tone audio signal of 500 Hz and 2400 Hz, 30 mV (-18 dBm) at MIC jack.

Connect wattmeter to ANT output.
audio generator to Mic Jack

VR12

Key TX; adjust for 45 watts PEP.

AM CARRIER POWER HIGH:
Set mode to AM,
MIKE GAIN at minimum.
RF Power to HI.

Connect wattmeter to ANT output.

VR13

Key TX; adjust for for 8-10 watts
CAUTION! Do not exceed this level. Damage to power transistors and inability to achieve 100% modulation from insufficient audio power will result.

AM CARRIER POWER LOW:
RF Power to LO .

Connect wattmeter to ANT output.

VR16

VR21A

Key TX & adjust for 1-3 Watt output

VR21A S-3 only

RF METER:
Set mode to AM,
MIKE GAIN at minimum.

Connect wattmeter to ANT output.

VR8

Adjust so panel meter agrees with Wattmeter.

AMC:
Mode to AM.
MIKE GAIN to maximum.
Inject audio signal of 1KHz 30mV (-18 dBm) at MIC jack.

Connect modulation meter to ANT output.

VR14

Adjust for 100% modulation depth.

FM DEVIATION:
Mode to FM
MIKE GAIN to maximum.
Inject 1 KHz, 30 mV audio signal at mike jack.

Connect deviation meter to ANT output.

VR5

Adjust for total deviation of 4.5 KHz.