Gary Bernstein wrote:
Thanks Scott for the helpful reply. I'll check on those things. For what =
it's worth when I connect an antenna to the coax connector in the back of t=
he radio (modification done by someone else), I hear some low grade radio n=
oise which comes when connected, then disappears when disconnected. So fro=
m what I gather the receiver is doing what it should for the most part, but=
not on all bands.

Be careful also, we're in a solar minimum. If you don't hear anything above
10 MHz, for instance, it's likely because there is nothing to hear. That is
why the signal generator is needed to know the real state of things.


Your explanation makes sense. Time to bring out my HP =
signal generator (the pro model) and do some checks at this point. I am sus=
pecting contacts to be the main issue. You'd have to hear the sound in per=
son when I change bands. Not quiet a loud connection like on the first 3 b=
ands, but it sounds like it's trying. That could be a good sign and not so=
mething major hopefully.

It's been more than thirty years since I worked on a 51J... I got mine working
great, and then traded it for an R-390A. I do miss the 51J tuning and the
better audio but the R-390 stability is amazing.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."