Encoder wiring (mode C for transponder)

[Battson]

Hi,

I have a question about the power wiring for the encoder (dynon model) which is connecting to my KT-76A transponder. Does the power wire and earth wire from the encoder need a seperate connection to the buss power and airframe earth for the Transponder, or can I simply splice them into the connections for power and earth which connect to the back of the Transponder's plug?

 

[dynonsupport]

You can share the transponder's power with the encoder converter. Some transponders even have an output on the pinout to power an encoder, which I think is pin 11 on the KT-76A, and you could use this as well.

 

[Battson]

Thanks - can I assume it's also OK to share the ground connection?

I will check the KT76A manual to confirm it's pin 11.

 

[Dynon]

Yeah. You can tie the ground connection that the encoder needs into the transponder's ground.