[amsat-bb] Re: [Hearsat] Opinions on receivers
smeuse at mara.org
Tue Oct 6 20:24:49 PDT 2009
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.
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