Magnum DeltaForce Updates And Modifications page 2

VARIABLE RESISTOR INFORMATION
Variable Resistor
RV-101
RV-102
RV-103
RV-104
RV-106
RV-107
RV-108
RV-109
RV-111
RV-112
RV-113
RV-114
RV-116
RV-117
RV-118
RV-119
RV-120
AM CARRIER POWER OUTPUT ADJUSTMENTS
Follow the steps below to reset or adjust the DeltaForce AM carrier power output levels.
1. Remove the bottom, or speaker, cabinet.
2. Connect the radio to a reliable and calibrated watt meter.
3. Rotate the front panel power control full clockwise (maximum power output setting).
4. To set maximum AM carrier level, adjust RV-118 to desired level. DO NOT ADJUST CARRIER LEVEL OVER 10
WATTS.
5. Rotate the front panel power control full counter-clockwise (minimum power output setting).
6. To set minimum AM carrier level, adjust RV-117 to desired level.
LOWERING AM CARRIER POWER LEVEL
The stock DeltaForce has the AM carrier power level set at 4 watts minimum and 10 watts maximum. Follow the steps
below to set the AM carrier power level to 1 watt minimum and 10 watts maximum.
1. Turn off the radio and disconnect from power source.
2. Remove the bottom, or speaker, cabinet.
3. Locate 470 ohm resistor on the power/calibrate front panel control potentiometer.
4. Add a 220 ohm resistor across the 470 ohm resistor (solder the legs of the 220 ohm resistor to the legs of the 470 ohm
resistor).
5. Reset AM carrier power output for 10 watts maximum. See AM CARRIER POWER OUTPUT ADJUSTMENTS
instruction.
DISABLING THE ALC FOR INCREASED MODULATION
Many radio operators prefer to remove the modulation limiting transistor from their radio to increase the modulation.
Follow the steps below to do this modification. NOTE: As with any radio, removing the modulation limiting transistor in
the DeltaForce will increase distortion and is not recommended by the manufacturer.
1. Turn off the radio and disconnect from power source.
2. Remove the cabinets.
3. Locate and remove the Q 142 transistor. This is the modulation limiting transistor.
Magnum DeltaForce Updates and Modifications
Adjustment
AM "S" Meter
SSB "S" Meter
SSB Squelch
AM Squelch
FM Deviation
SSB Carrier Balance
Transmit Frequency Adjustment
FM Repeater Tone
RF Meter
Q169 Final Bias Control
Q168 Final Bias Control
Driver Bias Control
SSB ALC
AM Carrier Low Power Adjustment
AM Carrier High Power Adjustment
AM AMC
CW Side Tone
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