[R-390] More on Dead R-390A

[Bob Camp]

Hi

It sounds like you have multiple problems on the radio. That always 
makes troubleshooting things a bit tough. The "everything below 8 MHz 
dead" problem is normally the 17 MHz oscillator not firing up. It won't 
kill the whole radio though.

I would strongly recommend starting out with what ever test gear you 
have and doing some basic checks. Even a cheap radio shack VOM and a 
downloaded copy of the Y2K manual will get you on the way to isolating 
what's going on. There are some reasonable voltage charts in chapter 5 
(I think ...) of the manual that should be of help in figuring out 
where to start.

This is a tube radio and running it 24/7 will *eventualy* break it ....

Of course they also are 100% repairable by normal non-rocket scientist 
beer drinking humans. Time to dive in!

	Take Care!

		Bob Camp


On Feb 19, 2005, at 10:24 PM, Bill Keller wrote:

> Many thanks to all the people who have given me advice.  The 3TF7 
> checked out fine   But something else has changed since I first 
> reported the problem.  At first, I was getting no signal period on any 
> band under any conditions or control settings.  Now, all of a sudden, 
> I have started getting very weak signals on all bands that I have 
> checked so far, but only with the BFO on and both gain controls turned 
> all the way up.  With BFO off, I still get nothing.  Before this radio 
> went dead, I was running it 24/7, because if I didn't, reception would 
> get very weak or disappear altogether on bands below 8mc.  I wonder if 
> that problem and this one are related?
> Bill K.
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