[amsat-bb] Re: [Hearsat] Opinions on receivers
kq6ea at pacbell.net
Tue Oct 6 21:15:30 PDT 2009
There's quite a list of things for the R7000 on the mods.dk website.
--- On Tue, 10/6/09, Greg D. <ko6th_greg at hotmail.com> wrote:
> From: Greg D. <ko6th_greg at hotmail.com>
> Subject: [amsat-bb] Re: [Hearsat] Opinions on receivers
> To: smeuse at mara.org
> Cc: amsat-bb at amsat.org, lmoline at hotmail.com
> Date: Tuesday, October 6, 2009, 8:41 PM
> REALLY? Great tip! It's never been a great
> receiver, but anything will help.
> I'll do some Googling around, but would you happen to have
> a pointer to more detailed information on the repair?
> > Date: Tue, 6 Oct 2009 23:24:49 -0400
> > From: smeuse at mara.org
> > To: ko6th_greg at hotmail.com
> > CC: amsat-bb at amsat.org;
> lmoline at hotmail.com
> > Subject: Re: [amsat-bb] Re: [Hearsat] Opinions on
> > Greg D. expunged (ko6th_greg at hotmail.com):
> > >
> > > But, as a general coverage receiver or scanner,
> it's 20-year age clearly shows. First of all, it's a
> bit deaf by modern standards. The local NWS weather
> channel is an S6 or S7, being fed by a very large TV
> antenna, with Preamp, in the attic. It's full scale on
> my HT with its rubber duck antenna in the shack. My
> S-band equipment (Drake 2880, and all that) barely gets
> above S1 or S2. You get the idea.
> > Keep in mind that the lack of receive sensitivity in
> the R7000 most likely is due to old leaking electrolytic
> caps. Specifically, there is a DC-DC converter board on the
> underside of the receiver that ends up generating broadband
> noise as the caps fail over time. I recently rebuilt this
> board and have regained nearly all of the sensitivity that
> I've lost. I suspect that if I replaced more electrolytics I
> could have it back to factory specs.
> > -Steve
> > N1JFU - http://n1jfu.blogspot.com -
> smeuse at twitter
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