> On 24 Feb 2017, at 5:16 AM, Jim Staniforth <staniforth...@yahoo.com> wrote: > > Too many antennas! > I went with the Class 1 TXP for use at altitude and in case of the need to > ADS-B equip, but there is no GPS connected at the moment. The TT22 operates > purely as a Mode S transponder unless interrogated as Mode C, in which case > it responds as Mode C.
Y’ok, mode-S without ADS-B then. Meets expectations. > One GPS source possibility is the Trig TN70. TN70 looks interesting. $3k for a GPS feels offensive, though :) > Added that the aircraft is an N-registered Experimental glider. … aaaaand that explains why you went for the TT22 instead of the TT21, I take it? The US mandate requires a class 1 transponder. AFAICT the only difference between class 1 and class 2 is transmit signal strength, and Australia’s regs specify no preference for one or the other, so I saved $500 and got a TT21 instead :-) - mark _______________________________________________ Aus-soaring mailing list Aus-soaring@lists.base64.com.au http://lists.base64.com.au/listinfo/aus-soaring
