Fw: [R-390] cyclic reception, 0-8MC, non A

[Bill Smith]

----- Original Message -----
From: "Bill Smith" <billsmith@ispwest.com>
To: <R390rcvr@aol.com>
Sent: Thursday, February 13, 2003 8:14 PM
Subject: Re: [R-390] cyclic reception, 0-8MC, non A


> Check the power supply.  There is a voltage pin on the left-hand side of
the
> chassis.  I seem to recall I had that problem, which was traced to a very
> weak 6082.
>
> 73 de Bill, AB6MT
> billsmith@ispwest.com
>
> ----- Original Message -----
> From: <R390rcvr@aol.com>
> To: <R-390@mailman.qth.net>
> Sent: Thursday, February 13, 2003 8:06 PM
> Subject: [R-390] cyclic reception, 0-8MC, non A
>
>
> > Good evening:
> >
> > Interesting behavior from my 'new' non A.  When listening to it tonight,
> on
> > 0-7MC,
> > the reception would abruptly go in and out on approx  5 sec cycle. On
for
> 5,
> > off for 5 sec. Dropped out completely when off. The cycling varied a
bit,
> not
> > absolutely regular, but fairly close. Was fine on 8 meg and above. I
> replaced
> > both V203, 1st mixer, used only on 0-8MC, and V401, the first crystal
> > oscillator, which operates only on 0-8MC.
> >
> > I varied the line voltage, didn't seem to effect cycle speed. No control
> > settings seemed to make any difference. When it was 'on', the reception
> > seemed just fine.
> >
> > It seems unlikely that some thermally induced problem could be so
regular.
> >
> > I would certainely be interested in any ideas that might steer me in the
> > right direction.
> >
> > Cheers
> >
> > Randy Stout
> >
> >
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