I recently replaced my transponder to make my airplane ADS-B Out compliant, and my attitude gyro with an electric backed-up AI to minimize fear of vacuum failure. Both the transponder and the AI were working well upon removal.

I also have the old transponder which the AT-165 replaced (see below) which may or may not be repairable.

Transponder #1: Narco AT-165 value series, designed as a slip-in replacement for King KT76 and KT78, so no "bucket". Installed new approximately 10 years ago, has approximately 625 hours, passed last transponder check May 2014. As is, no guarantee. $1,000, I pay shipping upon receipt of funds.

Transponder #2: King KT78, no "bucket". Worked intermittently (roughly 90% of the time) when replaced with the Narco. As is, no guarantee. $100, I pay shipping upon receipt of funds.

Attitude gyro: Not sure of brand (I can find out), installed new approximately 11 years ago, no discernible adverse problems, has approximately 700 hours on it. As is, no guarantee. $500, I pay shipping upon receipt of funds.

Both the Narco transponder and the AI are still at the avionics shop, so I need to retrieve them yet. I have the King transponder at home. I will consider reasonable offers by PM.

10% of gross sales prices will go to BCP.

Cary

Cary, do you know if the 165 will slide into a AT150 tray?
Thanks
David

Hmm, I wrote a response and it disappeared! Oh well.

I don't think so. As noted, it was a slip in replacement for a King KT78, which would be the bucket it would fit. I didn't think to ask the avionics shop to save that, so I don't know if they did, but I'll find out.

Cary