"Joe Bucher" wrote in message ...
I finally got around to restoring the old gal and it works pretty good
except for an annoying chirp on CW. It sounds like the VFO has trouble
starting and when it does the frequency shifts slightly down on keying.
Tubes are good and supply voltages look ok. Any ideas? Thanks much and 73!
Joe, KF9EU

Hi:
I use to have an old TX-1! No crystals, just a 6AU6 tube in the
tuner that always had heater power, even with the power-switch off. I
think in CW, as long as it's in TX mode, even while unkey'd, the VFO
was running. It didn't chirp if I ran the finals under light load.
(low cap 'tune' - high cap 'load')
If I tuned it for max output at a given load, it would chirp.