[R-390] Non-A alignment question

[Shoppa, Tim]

Severely out-of-whack PTO, as in broken wire or cracked capacitor or maybe just a loose shaft clamp between main tuning knob/Oldham coupler/PTO?

The original R-390 docs don't reference a frequency counter because that was only a gleam in anyone's eye at the time, but it's a very handy tool for 2011 :-).

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Paul Staupe
Sent: Wednesday, February 23, 2011 11:05 AM
To: r-390 at mailman.qth.net
Subject: [R-390] Non-A alignment question

I recently got a R-390/URR (non-A) that was working properly when it was put
in storage about 20 years ago.  When I received it, there was audio hiss,
but no stations received.  I tried tuning it up using the manual with my
URM-25D and a VTVM on the diode load to no avail.  I finally gave up and
tried to peak a 1500 kc signal directly to the unbalanced input.  What I got
was a band of BCB stations that was received about 630 kc higher than
indicated on the Veeder Root counter... eg. WHO, Des Moines at 1040 would be
received at 1670 kc, WLOL on 1330 would be at 1975 etc...

Does anybody have any suggestions as to what this could be?

Thanks,

Paul W0AD
______________________________________________________________
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