Hi Bob and all! I recall there was a HAARP experiment in, or near the 40 meter band. If I recall correctly, Randy, K7AGE, had recorded it for a youtube segment. I foget the power and gain at the site, but it was no doubt impressive.
73, Jeff WB3JFS ----- Original Message ----- From: "Bob Bruninga" <bruni...@usna.edu> To: <amsat-bb@amsat.org> Sent: Thursday, January 20, 2011 3:17 PM Subject: [amsat-bb] 40m EME (AMSAT 0) >> Subject: [amsat-bb] Re: FW: Re: em40 needed > > I misread this as something to do with 40m EME and got so distracted doing > the calculations that I may as well post them. > > By my guess, if one could find an abandoned K mart parking lot with 160' > spacing between light poles (about 30' high), one could hang 16 dipoles. > If > it was over GOOD swamp land, that might equal about 14 dB antenna gain. > > The path loss at 40m is 36 dB better than at UHF so the link would be > about > 0 dB SNR on a CW signal maybe. But from this one has to subtract a huge > amount of noise on 40m. And it would only work at high elevations with > really QUIET sun cycle. (you could point it with some phase > adjustments)... > > But several dB of processing gain via DSP could bring it back up? > > These are only wild guesses. But it was fun. I'd love to see an > expert's > calculation just for the drill. > > Bob, WB4APR > > _______________________________________________ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
