Transmitter Testing; Test Equipment Required; Standard Test Conditions - Hallicrafters SR-400 CYCLONE II Manual

3. TRANSMITTER TESTING

At the start of the receiver testing you replaced the power supply fuse with a 4 amp normal delay. It is time to
re-insert the 5 amp slo-blow fuse. The goal of this section is not to get maximum power out of the radio. The
goal is simply to prove that the major transmitter sections are functioning. For now 100 watts or better is good.
CAUTION: FATAL VOLTAGES ARE OPEN AND EXPOSED ONCE THE COVERS OR CASE IS
REMOVED. OBSERVE THE FREE HAND RULE. THAT IS, ANY TIME THE POWER IS APPLIED, IF
YOU ARE RIGHT HANDED YOUR LEFT HAND IS IN YOUR HIP POCKET. IF YOU ARE LEFT
HANDED YOUR RIGHT HAND IS IN YOUR HIP POCKET
MAJOR KEY POINT, the transmitter testing process assumes that the receiver has been tested and is
operating to specs.

3-1. TEST EQUIPMENT REQUIRED

500 watt wattmeter & dummy load
100 MHz scope
Frequency counter
Audio oscillator with 600 ohm output
Driver capacitive pickup (home brew item see figure section
600 ohm dynamic mic
Multimeter 2 VDC full-scale and 10 VDC full-scale recommended
Optional telegraph key

3-2. STANDARD TEST CONDITIONS

You will start with the following control settings
OPERATION
FUNCTION
CAL
CAL ADJ
MAIN TUNING
CW filter
NOTCH
BAND SELECTOR 7.0
PRESELECTOR
AF GAIN
RF GAIN
NOISE BLANKER
METER
RF LEVEL
MIC GAIN
RIT
RIT CONTROL
LOAD & PLATE
Wattmeter and load connected to J1.
WDØGOF 6/22/20014
REPAIR AND RESTORATION OF THE SR-400
MOX
LSB
OFF
MID RANGE
7.3MHZ
OFF
CCW
40
MIN
MIN
OFF
RFO/S
CCW
CCW
OFF
MID RANGE
PRESET TO VALUES ON CHART ON PAGE 20 OR 21 OF MANUAL
)
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