[Collins] 30S-1 Repair

[David Knepper]

Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com
----- Original Message -----
From: "David Knepper" <cra at floodcity.net>
To: <k2qde at optonline.net>
Sent: Friday, July 09, 2004 8:43 AM
Subject: Re: [Collins] 30S-1 Repair


> Nice to hear from you, Stu.
>
> Many of the Collins are experiencing electrolytic failure, particularly,
in
> the S-Line and KWM-2, with that 3 section capacitor that sits in back of
the
> meter.  Here is another one for the books, the 30S-1.
>
> I have read many comments from owners who are experiencing that premature
> unkeying of the plate control relay in the 30S-1.  Finding that weak C-211
> is the problem.  Finding an exact replacement is another matter.  I wonder
> if Antique Radio Supply in Tempe, AZ is carrying them?  Did not look.
>
> All my best.
>
> Dave, W3ST
> Publisher of the Collins Journal
> Secretary to the Collins Radio Association
> www.collinsra.com
> ----- Original Message -----
> From: <k2qde at optonline.net>
> To: "David Knepper" <cra at floodcity.net>
> Cc: "Collins Mail List" <collins at mailman.qth.net>
> Sent: Friday, July 09, 2004 9:30 AM
> Subject: Re: [Collins] 30S-1 Repair
>
>
> > Dave,
> >
> > These were available not too long ago from SSN. Guess they ran out.
> >
> > Stu
> >
> >
> > ----- Original Message -----
> > From: David Knepper <cra at floodcity.net>
> > Date: Thursday, July 8, 2004 10:00 pm
> > Subject: [Collins] 30S-1 Repair
> >
> > > I have been experiencing the high voltage dropping out on one of
> > > the 30S-1's
> > > at the Collins Radio Center.  Finally found the problem and wanted
> > > to pass
> > > it on.
> > >
> > > There is a a two section electroyltic can type capacitor (C211A
> > > and C211B)
> > > mounted on the subchassis toward the front right.  This capacitor
> > > serves to
> > > provide a "boost" to the voltage feeding K101 and K203 the plate
> > > currentrelay.
> > >
> > > If your high voltage drops out or fails to hold in, then, the
> > > culprit, in my
> > > case was this two section capacitor.  Finding a direct replacement
> > > can be
> > > difficult so you may have to wire in a couple of 300 mfd/25 volt
> > > caps across
> > > the terminals.
> > >
> > > K203 energizes very nicely after changing out this aluminum can
> > > electroylytic.
> > >
> > >
> > > Dave, W3ST
> > > Publisher of the Collins Journal
> > > Secretary to the Collins Radio Association
> > > www.collinsra.com
> > >
> > > _______________________________________________
> > > Collins mailing list
> > > Collins at mailman.qth.net
> > > http://mailman.qth.net/mailman/listinfo/collins
> > >
> >
>