Or see
http://www.cozybuilders.org/cad_files/mode_c_tester.html
for starters, but proper certification also required.
Also, transponder testers sell for USD100 or so on Ebay. But I don't know
what's involved in testing the tester!
Duncan McF.
----- Original Message -----
From: <irampil@notes.cc.sunysb.edu>
Subject: Re: Europa-List: Transponder Testing
>
>
> Hi Folks,
>
> I'm still trying to find a way of testing my transponder (and Mode C)
> without
> having to pull the panel to take it into the radio shop and have them test
>
> it.
>
> Where are the definitions of what constitutes a 'test'? Obviously it's
> more
> than just calling up ATC and asking them if they 'can see me' and have
> them
> confirm your altitude (or is it?).
>
>
> In the US, all a/c flying class B,C airspace or IFR requires a
> certificated biannual calibration of transponder encoder.
> This requires a trip to an avionics shop, or a "house call" by the
> avionics technician.
>
> The test in no way requires pulling the equipment.
>
> A test box is attached to your pitot and static probes (or elsewhere to
> the tubing) and set
> to generate a set of pressures. They check for leak and for calibration.
> They check to see
> what your transponder is sending as altitude. They then stamp your
> airframe logbook
> and date it.
>
> My recent venture to MAC Avionics at Lakeland cost me $225 but we spent
> over two
> hours playing with and calibrating my EFIS system.
>
> Ira N224XS (now officially airworthy!!!)
>
>
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