Wow! 2 watts or so EIRP from inside. That's incredible. What was the elevation of the satellite at the time?
73, Paul, N8HM On Sun, Dec 8, 2013 at 11:39 PM, Wyatt Dirks <[email protected]> wrote: > Well tonight I was trying a few things on ao-73. But mid pass I got bored > if you will and I turned around and grabbed my ft817. I had the mic hooked > up and had the stock rubber duck installed already. I dialed in the correct > uplink frequency and did I quick test call and sure enough I saw a trace on > the water fall. I thought I had it set to five watts but after pass looked > and I had it set to 2.5w out. So I heard myself through the transponder > using 2.5w into the stock rubber duck on ft817. The link below is a short > recording of the audio I got. > > > https://www.dropbox.com/sh/1ggmarxnx2otjxz/Gjh6imD01t/ft817%20rubber%20duck%20on%20ao73.wav > > Anyway it doesn't take much power to work ao73. > > 73 Wyatt > AC0RA > > > Date: Sun, 8 Dec 2013 15:13:24 -0500 > > From: [email protected] > > To: [email protected] > > Subject: [amsat-bb] Power output for using AO-73 transponder > > > > > FYI - In a sidebar on their website, AMSAT-UK requests that stations > limit > > power output to 25W EIRP for using the AO-73's transponder. > > > > "FUNcube-1 / AO-73 > > Radio Communications Subsystem > > • 145.935 MHz BPSK Telemetry 30 or 300 mW > > • Inverting SSB/CW transponder 300 mW PEP > > - 435.150 – 435.130 MHz Uplink LSB > > - 145.950 – 145.970 MHz Downlink USB > > Educational Telemetry beacon is 300 mW during day and 30 mW at night. > > Transponder is only active during night passes. > > Please use a maximium uplink power of 5 watts to a 7 dBi gain antenna > (25 w > > EIRP). Lower power will also work well. > > If adjusting for Doppler shift manually try tuning the uplink frequency > > while transmitting to keep the downlink constant." > > > > http://amsat-uk.org/ > > > > 73, > > > > Paul Stoetzer, N8HM > > Washington, DC > > _______________________________________________ > > 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 > _______________________________________________ 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
