[amsat-bb] More on the transponder.
Rsoifer at aol.com
Fri Aug 5 10:08:50 PDT 2011
Further to my last email, a full quarter-wavelength antenna for 435 MHz
would be about 6.5 inches long. Lou estimates that the actual antenna is
only about 1.5 inches. The short length has two effects: a reduced capture
area for reception, and a greater likelihood of blockage by the main body of
the spacecraft. If it's blocked, it won't hear much of anything. If it
isn't, it looks like it will hear the bigger AO-13/AO-40 class stations
(typical EIRP about 1 kW). With my EIRP of 50 watts, I tried CW instead of SSB.
I heard myself for about 2 minutes, but was only 449. We'll see if
anyone else can hear me in the next few days.
73 Ray W2RS
More information about the AMSAT-BB