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Blind Encoder Power Connection to Garmin GTX-327 Transponder

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lamphere(at)vabb.com
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Posted: Sat Aug 25, 2007 12:13 pm Post subject: Blind Encoder Power Connection to Garmin GTX-327 Transponder

Anyone have a blind altitude encoder (like an AK-350) that is getting it's 

power from pin 14 (switched power output) on a Garmin GTX327 transponder?



I notice that the schematic for the Garmin says that pin is good for 1.5A 

max. The encoder document says it draws .60 amp for 1 min during warm-up.



This seems to me to be OK, but what puzzles me is that the page in the 

encoder that lists connections for the 320/327 has pin 15 (main power for 

the 327) listed for power.



What have you guys used for powering up the blind encoder??



Thanks,



Dave

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mlas(at)cox.net
Guest

Posted: Sat Aug 25, 2007 12:41 pm Post subject: Blind Encoder Power Connection to Garmin GTX-327 Transponder

Dave,



You can do it either way!  Pin 14 is switched out limited to 1.5 amps

which is well below the use of the encoder.  If you use an avionics

master you can go to pin 15 which is power into the transponder or you

could go directly to a circuit breaker.



Mike



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