After work today I got much closer with the vfo calibration,
and moved onto the TX alignment.
I hooked up the dummy load and the 0-20 watt meter.
3.5 MHz 12.5 watts out, 2.7 amps
7 MHz 14 watts out, 4.3 amps
10 MHz 10 watts out, 2.4 amps
14 MHz 8 watts out, 2.3 amps
18 MHz 9 watts out 1.8 amps
21 MHz 9 watts out, 1.8 amps
24 MHz 6 watts out, 1.5 amps
28 MHz 5 watts out, 1.8 amps
13.8 volts per my DMM.
When tuning C21 in the 30 meter bandpass, the output power
would take off and go to 20 watts till I turned the power down
then back up, then it acted normal.
In my kit, C22 was a 2.7pf, not the 3.3pf listed.
I assumed the 2.7 was what they could get instead of the 3.3.
Something is really wrong there, but the parts seem to be
the correct values, the toroids have the correct turns, etc.
I checked the voltage at the RF output detector and its ok.
I looked into all the trouble shooting steps in the manual,
made sure all the correct parts are in the correct places,
the toroids have the correct turns, etc.
Nothing gets hot, or even warm, despite the 5 minute key downs
at full power.
Looking at things on the spec an, after the power knob
is up past 1/2 to 3/4 the harmonics go way up, but I might
be picking signal up before the filters.
One other thing I noticed, the RF watt meter built into the rig
reads correct on 80 and 40, but does not reflect the lower power
output on the higher bands, its still pegged.
I looked at the signal on the spec an, probing the driver input and
output power levels, and I don't think the drive falls off,
I did not probe the output of the power amp as it would risk
the spec an (1 watt max input).
I don't need lots of power out, but dislike when something does
not work up to spec.
The receiver seems to work very well, although I have
not run the spectrogram on the filters yet.
Brett
N2DTS
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