----- Original Message ----- From: "Edward Cole" kl7uw@acsalaska.net To: "Dave Guimont" dguimon1@san.rr.com; "Joe" nss@mwt.net Cc: amsat-bb@amsat.org Sent: Saturday, July 19, 2008 3:28 PM Subject: [amsat-bb] Re: where all the users
At 08:25 PM 7/18/2008, Dave Guimont wrote:
Yes puters do make it easyier, but not tottally absolutely necessary.
in the old days we tracked the birds using something called math,
Made little paper things with clear plastic overlays to simulate the birds path across the sky,
Doppler? uhhhh, we tristed the vfo to keep it in tune,
geeech,
Joe WB9SBD
Joe,
I had exactly the same thoughts, but hesitated to say it for fear the one who made the comment would not understand "twisting a knob"!!!
73, Dave, WB6LLO dguimon1@san.rr.com Disagree: I learn.... Pulling for P3E...Yeah, maybe on 435-MHz but try doing that at 1268 or 2400 on the Leos! Not very easy/practical. One hand tunes the uplink, other moves azimuth, third the elevation, and fourth keys the mic...fifth keeps the log...uhuh.
I find operating ordinary old mode-B or mode-J hard enough and think auto-tracking (at least) is made for the Leos. For AO-10/13/40 its non-issue, of course, Doppler rates and tracking rates are lower.
Ed - KL7UW
Hi Ed, KL7UW
In conlusion you are saying that a LEO FM satellite like AO-51 when working at 1268 or 2400 MHz is not suitable for beginners for newcomers and for the students because the operation requires a lot of money to compensate for doppler and traking and for a suitable tranceiver for the above frequencies..............and I agree with you because the mode L/S on AO40 was more economical and easier to do with no automatic antenna traking and only manual tuning twisting a knob.
73" de
i8CVS Domenico