for the meter to "peak" above the 100 ma. plateau
on ei ther side of resonance. If there is such a peak,
adjust C40l, the P.A NEUTRALIZING trimmer
to suppress the peak. When properly neutralized,
the meter reading will hold steadily at 100 ma.
except for the sharp dip at resonance, but there
will be no peak above the 100 ma. level.
0 Increase gain of audio generator until the watt-
meter reads 40 watts. Sweep generator down to
200 Hertz and adjust the USB carrier oscillator
trimmer, C1S03, for a reading of 10 watts.
CD Switch to the LSB position. Adjust the LSB car-
rier oscillator trimmer, C1S0l, for a reading of
10 watts.
<D Key the transmitter with the Mic. button, and re-
adjust the CARRIER BALANCE control for mini.
mum Power Amplifier current. Power Amplifier
idling current should be on the "delta" symbol. If
not, repeat the Power Amplifier Bias adjustment
described in TRANSMITTER AUGNMENT,
STEP 1.
@ Re-check with audio generator set at 1500 Hertz
and 40 watts. Sweep down to 200 Hertz and re-
adjust carrier oscillator trimmers, if required, for
10 watts.
4. Carrier Frequency Adjustment.
A dummy load wattmeter and audio generator are reo
quired for this adjustment.
-~-~.. .~..'-- 0 After allowing a five minute warm-up period, tune
the transmitter to approxjmatley 28.3 MHz.
@ Key the transmitter with the Mic. button, and
adjust the CARRIER BALANCE control for mini-
mum power amplifier current.
S. VFO Calibration.
Mter allowing approxjmately five minutes for warm-up,
tune the dial to the 200 KHz increment for any of the
10 meter ranges to be calibrated. For CB calibration,
tune the dial to the 27,100 KHz increment. Using the
~1 00 KHz crystal calibrator as a signal source, tune the
signal for zero beat and note the cor!espon~~'!g-dial read.
ing. If the signal does not zero beat on the desired dial
increment, locate the VFO cover and carefully adjust the
correct trimmer until it does.
Use an insulated alignment tool for adjustment. Accu-
racy in other parts of the bands will be quite good, but
remember that the 1011B is not to be considered a fre-
quency standard; Be cautious when operating near band
edges.
0 Insert 1500 Hertz of audio from an audio genera-
tor into the Mic. Jack on the front panel. Adjust
the gain of the audio generator and the Mic GAIN
control (R1404) until the wattmeter reads approxi-
mately 10 to 15 watts.
6. Troubleshooting.
The information contained in Figures 6 and 7, together
with the voltage and resistance measurements in Table 1,
and the information in Table 2, should be sufficient for
most troubleshooting by the average licensed amateur
radio operator.
@ Adjust the First I.F. coil, L701, for maximum out-
put. Adjust both slugs of the balanced modulator
transformer, T1301, for maximum output.
16
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