Tx Alignment Locations - Ranger RCI-2950 Service Manual

SETTINGS
DRIVER BIAS:
Set mode to LSB
Mic Gain to minimum
FINAL BIAS:
Set mode to LSB
Mic Gain to minimum
Mode LSB
Frequency to 28.000MHz
Adjust VR14
fully counterclockwise.
Adjust VR12
fully counterclockwise.
Set generator for 30mV RMS, 1KHz
sinewave.
Increase Mic gain to maximum
(fully clockwise).
SSB CARRIER BALANCE:
Set mode to USB
MIKE GAIN to minimum.
SSB HIGH PWR:
With Mic gain still a maximum on LSB
Set RF PWR control on radio to
minimum.
SSB LOW PWR:
With Mic gain still a maximum on LSB
Set RF PWR control on radio to
minimum.
AM POWER HIGH:
Set RF PWR control on radio to
maximum
Put mode selector on AM.
Mic Gain to minimum
AM POWER LOW:
Set RF PWR control on radio to
minimum.
Mic Gain to minimum
RF METER:
Set RF PWR control on radio to
maximum.
Mic Gain to minimum.
AMC:
Mode to AM
Set generator for 30mV RMS, 1KHz
sinewave.
With Mic gain at maximum
FM DEVIATION:
Put mode selector on FM
RCI 2950
TX Alignment
CONNECTION
Remove TP1, TP2, TP3 Jumper PCB.
Connect DC Ammeter between TP9 and
TP8.
Connect DC Ammeter between TP9 and
TP7.
Replace TP1, TP2, TP3 Jumper PCB.
Connect an audio generator to (pin 2) and
ground (pin 1) of Mic connector.
Connect a wattmeter and 50ohm dummy
load to the antenna connector. Set
wattmeter for 30W scale.
Same as above.
Same as above.
Same as above.
Same as above.
Connect a wattmeter and 50ohm dummy
load to the antenna connector. Set
wattmeter for 30W scale.
Connect a wattmeter and 50ohm dummy
load to the antenna connector. Set
wattmeter for 30W scale.
Connect a wattmeter and 50ohm dummy
load to the antenna connector. Set
wattmeter for 30W scale.
Same as above.
Key transmitter and check for 4kHz
deviation ± 0.5 kHz. Use deviation meter or
service monitor.

TX Alignment Locations

ADJUST FOR
ADJUST
VR11
In TX adjust for 50-75mA.
N/A In TX check for 160-180mA.
Mic Gain Key the transmitter and slowly increase Mic Gain
until you obtain about 10W.
L19, L48
Adjust for maximum reading on wattmeter. Reduce
L47, L46, RF gain if necessary to maintain about 10 to 15W
L43, VC3 on wattmeter.
L34 Adjust for maximum output power
VR7 Key TX; adjust for minimum carrier on scope or
wattmeter. If necessary readjust for best balance of
sideband suppression between LSB & USB
VR12 Key the transmitter and adjust for 28W.
VR16
Key the transmitter and adjust for 10W.
VR13
Key transmitter with no modulation applied and
adjust for 10W.
VR15
Key transmitter with no modulation applied and
adjust for 2W.
VR8
Adjust so panel meter agrees with Wattmeter.
VR14
Adjust for 100% modulation. Use modulation meter
or oscilloscope with RF sampler.
N/A
Simply check for sufficient transmit audio.
There is no deviation adjustment provided in
this radio.