This is a great thread. Well, I am going to continue with full doppler and just resolve myself to tuning in some people that are not quite there yet. As a lot, I would think adding computer control to handle full doppler would not be that big a deal nowadays as most of the programs support it. I am not telling you how to spend your money though. The big test will be at Field Day when I am using full doppler and listening to everyone do the doppler-shuffle. :)
See you on the air as W4TA from Field Day but NEVER on an FM bird. 73, Tom Schaefer, NY4I n...@arrl.net EL88pb Monitoring EchoLink node KJ4FEC-L 489389 DSTAR Capable APRS: NY4I-15 On Jun 9, 2011, at 1:19 PM, David Palmer KB5WIA wrote: > Jerry's correct. If you only adjust your transmit frequency, such > that your receive frequency appears to stay the same -- then you're > automatically correcting for your own downlink doppler, but not for > anyone elses. Other hams in the footprint will still have to chase > you. The only way to stick with the "one true rule" is to adjust > *both* uplink and downlink during the pass. > > That being said, adjusting the higher (UHF) transmit frequency on > VO-52 and AO-07 only (ie. manual control) will get you pretty close, > and you won't drift a whole lot. I hear plenty of hams doing this, as > long as there are just one or a two QSO's going on, they don't drift > into each other very often. > > 73 de Dave KB5WIA / CM88 > SatPC32 with 2xFT817ND > > On Thu, Jun 9, 2011 at 7:35 AM, <n...@lavabit.com> wrote: >> OK my brain may be playing tricks, but if you vary only your transmit >> frequency such that you always hear yourself on the same downlink >> frequency, isn't it true that the other station may not necessarily be >> hearing you on the same downlink frequency and is chasing you anyway? >> Your doppler is +5kHz (for example) on the receive, the bird is just about >> to pass overhead of me though so my receive ferquency goes rapidly from >> +2kHz to -5kHz, your transmit tuning has no relation at all to what >> frequency I am listening on. Then the bird goes past you and you suddenly >> switch down 5kHz, so I have to follow you on my receive. >> >> Or am I nuts? (Quite possible, come see where I work and you will >> understand!) >> >> Jerry >> NØJY >> >>> I always varied the transmit. >>> >>> This way the person I'm talking to as well as any other listeners are >>> all on the same freq listening. >>> > > _______________________________________________ > 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
