[R-390] New (to me) R-390A Can't Tune SSB

[Jerry Stern]

Dear All,

Many thanks for all the detailed advice and yes I know the R-390A is not
desinged for SSB, I have another 390A with a CV-591 for comparisons
hihi.

It was a bad V505 I guess knocked from shipping this 90lb beast.  I
thought the BFO was working but I didn't do any systematic testing
(shame on me) but now that I replaced it with another 5749, the BFO
works like a charm. I guess I should start stocking up on a tube
replacement set and read the Y2K manual a few times.

73 Jerry
K1JOS



-----Original Message-----
From: Cecil Acuff [mailto:chacuff at cableone.net] 
Sent: Sunday, January 31, 2010 2:28 PM
To: Jerry Stern; R-390 at mailman.qth.net; 'Collins CCA Reflector'
Subject: Re: [R-390] New (to me) R-390A Can't Tune SSB


Tune WWV and see if the BFO will zero beat...may just be way off
frequency.

Cecil..
----- Original Message ----- 
From: "Jerry Stern" <jsternmd at att.net>
To: <R-390 at mailman.qth.net>; "'Collins CCA Reflector'" 
<collins at listserve.com>
Sent: Sunday, January 31, 2010 9:16 AM
Subject: [R-390] New (to me) R-390A Can't Tune SSB


> Just got a very nice R-390A and the receiver appears very sensitive 
> but I cannot tune in SSB signals. Weak or strong stations are just 
> garbled as if the radio is on the wrong sideband. I have checked for 
> any loosely seated tubes and the usual tapping around to see if I can 
> find any microphonics or signs but to no avail.  The BFO does seem to 
> be functional, at least to my ear, but I guess the problems would 
> still be likely in this stage?  I will start changing tubes but would 
> appreciate any other diagnostic advice.  I wouldn't bother the list 
> for this question but I cannot find any way to search through the R390

> archives.
>
> 73 Jerry
>
> K1JOS
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>