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
