Piper J3
Well Known Member
I have a Garmin 327 Transponder in my RV-12. I?m having a problem with uAvionix echoUAT ?sniffing? Baro Alt. My PAPR shows 100% fail for Baro Alt. I?ve been working with Kurt at uAvionix and they sent me a new echoUAT and it also fails Baro Alt.
I?m beginning to think I have a transponder problem. Transponder is set for 1200 ALT and displays pressure altitude. I can see steady pinging from ATC on the transponder so I think transponder is working. Transponder was certified one year ago.
Here?s my question? I notice the transponder antenna is loose ? the stem with the ball tip is able to be rotated in the mounting base. I assume the stem is connected to the center wire of the coax and it must be disconnected. I?m hoping this is the problem.
1) Do you think the Transponder is damaged because of no-load on the antenna?
2) Van?s show the part number for the antenna as AV-22. I look this PN up on Aircraft Spruce and see various Transponder antennas listed at different price points. Is there a difference in antennas? AV-11, AV-22, TED, CI 101.
I?m beginning to think I have a transponder problem. Transponder is set for 1200 ALT and displays pressure altitude. I can see steady pinging from ATC on the transponder so I think transponder is working. Transponder was certified one year ago.
Here?s my question? I notice the transponder antenna is loose ? the stem with the ball tip is able to be rotated in the mounting base. I assume the stem is connected to the center wire of the coax and it must be disconnected. I?m hoping this is the problem.
1) Do you think the Transponder is damaged because of no-load on the antenna?
2) Van?s show the part number for the antenna as AV-22. I look this PN up on Aircraft Spruce and see various Transponder antennas listed at different price points. Is there a difference in antennas? AV-11, AV-22, TED, CI 101.