It's not mandatory, but it's good practice, especially on FM where things get crowded and only one gets through. On transponders it is good to gauge your signal strength (especially on fragile sats like AO7), and to be able to match uplink and downlink for Doppler. However, with caveats and a sense of the pitfalls, experienced ops can make use of half duplex. A single 817 and an Arrow can make some neat QSOs on FO29!
73, Drew KO4MA (AMSAT-NA VP Operations) Sent from my iPhone On Feb 7, 2013, at 3:33 PM, "Kevin Muenzler, WB5RUE" <ke...@eaglecreekobservatory.org> wrote: > 73/all > > Is Full Duplex really required or just nice to have? Currently my setup > (which doesn't include an antenna at the moment due to storms) is a Yaesu > FT-790(uhf) and FT-290(vhf). Both do FM and SSB at about 25 watts. I've > used to use my 290 for the old RS-12/13 and RS-15 birds along with my FT-890 > (RIP) for the 10 meter downlink so I do have "full duplex" but is it a > necessary feature? I know it's nice to be able to hear yourself to know > that you are even getting into the machine. > > 73/ > > Kevin Muenzler, WB5RUE > Grid EL09uf > Eagle Creek Observatory > http://www.eaglecreekobservatory.org > I have not yet begun to procrastinate! > > > > -----Original Message----- > From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On > Behalf Of Andrew Glasbrenner > Sent: Thursday, February 07, 2013 11:04 AM > To: jeffrey.em...@gmail.com > Cc: amsat-bb@amsat.org > Subject: [amsat-bb] Re: Getting back into Satellites > > There is only one currently operable FM satellite, and many of the sats due > to be launched this year are transponders or FM/DSB repeaters. > > My suggestion would be to find a Yaesu 817 to get a toe into transponders, > and add -any- UHF receiver for full duplex FM. The little Baofeng UV3s are > like $45 and have good receivers in them. > > 73, Drew KO4MA > > Sent from my iPhone > > On Feb 7, 2013, at 10:26 AM, Jeffrey Embry <jeffrey.em...@gmail.com> wrote: > >> Good Day all, >> >> After a few years hiatis, I am contemplating getting back on the >> birds. Because I currently live in an apartment, I plan on starting >> the easy route using an arrow antenna. My question is, since I sold >> my last HT about a decade ago, what is recommended for the current >> models of HTs that have full-duplex capabilities? >> >> 73es, >> >> -- >> Jeff Embry, K3OQ >> FM19nb >> ARCI #11643, FPQRP #-696, >> QRP-L # 67, NAQCC #25, ARS #1733 >> AMSAT LM-2263 >> >> -- >> Success is the ability to go from one failure to another with no loss >> of enthusiasm. - Sir Winston Churchill >> _______________________________________________ >> 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 > > _______________________________________________ > 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
