Hi Jim, I use the same setup - but for analog uplink. Antennas are two 19 turn helix stacked about 2 wavelength above one another. The combined gain is 18 dBiC. That works most of the time - but EIRP is a bit low when AO-51 is at 3000 km range. For the digital uplink I think you need more EIRP. Either add a PA with 30 to 50 W out or larger antenna(s). 73 OZ1MY Ib ----- Original Message ----- From: "Jim Heck" [email protected] To: [email protected] Sent: Thursday, August 20, 2009 11:05 AM Subject: [amsat-bb] Use of ICOM 910 for AO-51 L-Band BBS Uplink?
I would be interested to know if anyone is using an ICOM 910 with the
module for Ao-51 uplink on the BBS? (The optional L-Band unit for the 910
watts according to the book).
I am particularly interested to know what type/gain of antenna I would
need to get
a reliable up link. I am planning to use about 20 metres of Ecoflex 10,
introduce a loss of something like 3 Dbs.
I know that the LBand/Digital up link is currently off, just gettting
the next 'on' period!
Sent via [email protected] 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