My Terra TRT 250D transponder has stopped working properly. I'm thinking I should replace it with a new transponder with ADS-B out capability. Problem is, I have an RV-4 and panel space is very limited. The Terra 250 D occupies a non-standard hole 3-1/8" wide by 1-5/8" high.
Can anyone recommend a transponder that will require minimum alteration of my existing panel?
(I'd include a photo if I knew how.)
Can anyone recommend a transponder that will require minimum alteration of my existing panel?
(I'd include a photo if I knew how.)