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Thread: Transponders

  1. #11
    Senior Member
    Join Date
    Jul 2011
    Location
    milwaukee wi
    Posts
    490

    Default Re: Transponders

    I have a GDL39-3D for ADS B in to a Garmin 660 GPS. For ADS B out, I have a Garmin GTX 335 with built in Waas GPS and altitude encoder. If I were doing it today, I would lean to micro Avionics. Things are changing quickly.

  2. #12

    Join Date
    Jun 2018
    Location
    Caldwell, ID
    Posts
    122

    Default Re: Transponders

    You guys all have some great "words of wisdom." Phil, I think you're absolutely right, wait until I'm ready to install, then decide what exactly I want.
    Bartman
    Retired USAF
    Kitfox 5
    N617BR

  3. #13
    GMKman's Avatar
    Join Date
    Jul 2016
    Location
    Tucson, AZ
    Posts
    60

    Default Re: Transponders

    I now have a Trig tt31 transponder. When I bought the plane, it had a kt76a. The trig is a direct-slide in transponder to the kt76a tray. I think all I need now is a trig tn72 receiver and ta70 antenna (about $700 for both) and should be ads-b compliant. Still looking into that.
    Brad Smith
    KF Vixen IO-240
    Flying when I have gas money

  4. #14
    Senior Member jiott's Avatar
    Join Date
    Jun 2010
    Location
    Portland, OR
    Posts
    2,959

    Default Re: Transponders

    I have the Dynon Skyview system and bought their mode S remote transponder (made by Trig I believe). When I was ready to add ads-b out the transponder was already compliant and all I had to do was buy a new WAAS GPS antenna puck.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  5. #15
    Senior Member
    Join Date
    Oct 2016
    Location
    Western Australian
    Posts
    218

    Default Re: Transponders

    If you have an EFIS (and in particular MGL) then the Trig transponders tie in very well. You can buy just the TT21/TT22 box (remote transponder) and control it through the EFIS, so have no panel-mounted heads.

    For me this is great, as it means the EFIS provides the extended squitter of the Mode S transponder with the GPS position and, thereby, provides ADSB Out. This is permitted under the 'experimental' rules of the UK and is a simple and cheap way of ensuring more people have ADSB Out (it is not mandated there). I do, however, appreciate the rules are different in the US but it might be an option to use for those aircraft that won't have ADSB mandated but think it's a good idea to have it.....just in a cheaper form.

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