[R-390] Where would you start?

[Barry]

Problems in the IF deck can cause the symptoms you describe.  If you have an
audio source, you can check the AF deck and work back up the chain from
there.

Barry - N4BUQ

----- Original Message -----
From: "Tracy Fort" <beerbarrel at cox.net>
To: <R-390 at mailman.qth.net>
Sent: Saturday, March 18, 2006 6:32 AM
Subject: RE: [R-390] Where would you start?



Paolo,

I'm so-so at it. I'm not close to an expert though. I do have the manual. I
was just hunting quick things to check. I can't tell is sensitivity is Ok
because volume is quite low. At this point, I'm thinking that it's only
audio. I'm think I might check for the leaky cap at V507 tube socket. I lose
volume completely if I turn off limiter switch.

Thanks,
Tracy

-----Original Message-----
From: paolo gramigna [mailto:paolo.gramigna at controllo.it]
Sent: Saturday, March 18, 2006 7:20 AM
To: 'Tracy Fort'
Subject: R: [R-390] Where would you start?



Are you familiar with servicing a vacuum tube radio? Do you have the R-390A
manual? You can get it here: http://www.hausernet.com/r390a/ if you don't.
those radio will loose plenty of sensitiviti if just one of the RF slugs is
off by a millimeter or so. You will need a few test instruments, and a few
special tools (bristol key). Let me know about your situation...

Paolo


-----Messaggio originale-----
Da: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] Per
conto di Tracy Fort
Inviato: sabato 18 marzo 2006 12.53
A: R-390 at mailman.qth.net
Oggetto: RE: [R-390] Where would you start?

I got carrier level to come up but no audio impoovement.

Tracy

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Tracy Fort
Sent: Saturday, March 18, 2006 6:42 AM
To: R-390 at mailman.qth.net
Subject: [R-390] Where would you start?


Just got a new 390a the other day. It seems to have arrived with a little
problem. It has extremely low audio output. I don't know if something was
shaken loose in shipping or not but it all looks good and was packed well.
Tuned to a local AM station with rf gain and audio maxed out I can barely
hear audio. I get very little carrier reading. It's slightly above zero. No
movement on the line meter either. I'm trying to figure out if it was
working OK before it was shipped and am waiting on a response from the
seller. I'm pretty sure that it was but wanted to make sure before I started
getting to deep into it. Are there any problems that jump out at anyone
right away that could be easy to check?

Tracy

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