Thanks Drew et al.
No one else on but me, or at least I was all I could hear, on the 0100Z pass, run ning about 60W to a 24 loop yagi. Question-- What is the power of the 1.2ghz downlink? The signal strength is at least 3 S units less that the 435.3 frequency. Anyone with 1.2ghz stuff---dust it off.
73 Bob W7LRD
----- Original Message ----- From: "Andrew Glasbrenner" glasbrenner@mindspring.com To: "Amsat-BB" amsat-bb@amsat.org, ao-51-modes@amsat.org Sent: Monday, October 12, 2009 4:22:24 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] AO-51 mode update
On tonight's pass at 23:20 I turned the 1268.7/435.15 repeater on. We'll run this along with the 145.92/435.3 repeater for a few days, except when collecting telemetry, until we get the rest of the schedule sorted out.
73, Drew KO4MA _______________________________________________ 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
Bob- W7LRD wrote:
Thanks Drew et al.
No one else on but me, or at least I was all I could hear, on the 0100Z pass, running about 60W to a 24 loop yagi. Question-- What is the power of the 1.2ghz downlink? The signal strength is at least 3 S units less that the 435.3 frequency. Anyone with 1.2ghz stuff---dust it off.
73 Bob W7LRD
450mw on .150, and 650mw on .300 right now. My guess is your receive antenna is RHCP. 435.150 feeds the LHCP antenna combination, so you are ~20 db down from the .300 downlink on a RHCP antenna.
73, Drew
Bob- W7LRD wrote:
Thanks Drew et al.
No one else on but me, or at least I was all I could hear, on the 0100Z pass, running about 60W to a 24 loop yagi. Question-- What is the power of the 1.2ghz downlink? The signal strength is at least 3 S units less that the 435.3 frequency. Anyone with 1.2ghz stuff---dust it off.
73 Bob W7LRD
Bob:
It sounds like you were transmitting on UHF and listening to L-band. If that is the case, you will never hear anyone. You need to transmit on (UPlink to) 1268.7 MHz and listen on (DOWNlink from) 435.3 MHz. There is no 1.2 GHz DOWNlink. :(
OTOH, maybe that was just a typographical error on your posting, because "60W to a 24 loop yagi" does, indeed, sound like you were UPlinking on 1.2 GHz... :)
Anyway, here are the voice modes that AO-51 supports:
Mode V/U (J) FM Voice Repeater (QRP): Operational Uplink: 145.8800 MHz FM Downlink 435.1500 MHz FM
Mode V/U (J) FM Voice Repeater: Operational **ON NOW** Uplink: 145.9200 MHz FM Downlink 435.3000 MHz FM
Mode V/S FM Voice Repeater: Operational Uplink: 145.8800 MHz FM Downlink 2401.2000 MHz FM
Mode L/U FM Voice Repeater: Operational **ON NOW** Uplink: 1268.7000 MHz FM Downlink 435.3000 MHz FM
The chicken and egg paradox continues. No one will get on the L band uplink if no satellites listen to L band, and no satellites will listen to L band if no ground stations get on the L band uplink. The best solution? More satellites with multiple transponder capability, particularly (preferably) with linear transponders, and higher orbits. Wishing for that is a necessary, but not sufficient condition for the dream to come to pass...
Just sign me confused and waiting, a/k/a W0JT
participants (3)
-
Andrew Glasbrenner -
Bob- W7LRD -
John P. Toscano