Hi Jamie In a separate email I have sent to you an article that I write for Radio Rivista 9/1993 describing with schematic diagrams and mechanical drawings my low noise GaAsFET high dinamic range and high selectivity cavity preamplifier for 435 MHz with NF=0,43 dB and gain G = 20 dB
I am using it with great success in my environment area in the bay of Naples wich is "hot" with a lot of ham activity, local pagers and FAA stations. By the way it require a lot of mechanical work but for best performance it must be tuned for the lowest Noise Figure using only a very simple diode noise generator that was described in the article. Unfortunately building low noise preamplifiers and tuning instruments by yourself in novadays seems to become a RF "endangered species" Have fun. 73" de i8CVS Domenico ----- Original Message ----- From: "James Cutler" <jwcut...@gmail.com> To: <amsat-bb@amsat.org> Sent: Friday, November 04, 2011 2:18 AM Subject: [amsat-bb] Mast-mounted preamp recommendation? > All, > > Does anyone have any recommendations on high quality mast-mounted preamps > for UHF? We're using the Icom AG-35 and not happy with the noise figure. > We're going to try an adjustment described here > http://www.eham.net/reviews/detail/6116. > > We are looking at the amps from ARR and SSB. Any other recommendations? > > http://www.ssbusa.com/gaasfet.html > http://www.advancedreceiver.com/page10.html > > Thanks, > > --Jamie > _______________________________________________ > 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
