Hi all,? I Have a FT-101B that no longer produces output power.
RX was and still is very good and stable
It was producing solid power on all bands until a few weeks ago when it went to the bench for alignment and cold neutralization.
While on the bench it seemed prudent to remove boards, clean edge connectors and sockets
I also changed electros on regulator board and a few others.
I started getting a click sound which turned out to be arcing from a loose wire to one of the filter cap terminals.? This took over a week to find but quick solder reflow fixed it.
After which I could dial up 60 mA bias current but there was no output in tune/CW or SSB
The accessories plug is in place, heater filaments are glowing.
C13 has been inspected and no sign of cracking - look fine
RL1 & RL2 both removed, carefully cleaned and replaced
Tried 3 different driver tubes
Still no power out.
I understand RL1 is the cause of many issues and not convinced there is a problem with it or the socket connections
The VFO lamp goes out when PTT is pushed
The relay clicks in and out.
I did note it had to be wriggled around while in its socket or there was no bias voltage?
I don't have another relay handy to just plug in and verify so what checks can I do to check the relays functioning properly
I'm reading up, going through old pages - there was a RL1 file somewhere with all known about it but can't locate that.
Really stuck for the moment but trying to be logical - something in the PA chain at fault?
What else could I measure and check?? I''m no expert but keen to learn while fixing
Christopher Larwood