Fixed the power "fade" (went from 120
watts to 80 watts within 5 seconds) by
rebuilding the AC-4. All is well with
the power supply, voltages are correct
and ripple is good.
What started the project was the fact
the the xmitter, when in CW, with key
down, I would get output power for two
seconds. Then the transmitter would
quit xmitting (heard relay click) for 1
second, then xmit for 2 seconds, then
stop xmitting for 1 second. Just sat
there and "oscillated from output power
to no output power (relay clicking every
time). The frequency of this can be
changed by cranking on the anti vox pot.
I cleaned relay contacts, and rotary
switch contacts to no avail. I searched
the web and saw someone else with a
similar problem, but the thread never
did reach a conclusion that the problem
was fixed.
Comments from the gang??
Tnx
Jim
WA9ZBV
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