[TenTec] Circuit breaker tripping excessively

[Craig Roberts]

Well, Ten Tec's official diagnosis is, "It could be anything" with a 
first reaction "sounds like the PA."

Fair enough.  Without the rig on TT's bench, it is impossible for them 
to pinpoint the problem.

The first thing I'll do when I get home tonight is measure the voltage 
drop from the power supply under load.  It could be a supply regulation 
problem.  That'd be nice because I'd much rather repair the supply than 
the radio.

Of course, it's possible that the PA transistors have gone south.  That 
would be unfortunate since the MRF277 finals are -- as has been noted -- 
"scarce as hen's teeth."  I've contacted one vendor who might be able to 
supply a single matched pair.  We'll see.  If I can't get the finals, I 
may have to convert to another PA scheme (or downgrade my Argosy to an 
ersatz Argonaut).

I'll keep y'all posted.

73,

Craig
W3CRR