I know this is a bit of a lazy question, as i havent yet looked in the documentation for the transponder yet, but at the weekend i was flying and talking to Farnborough and they said at various altitudes my transponder was reporting 300ft over my actual altitude, I had the correct QNH and it was 300ft over at 5000ft and at 1500ft.
So, my lazy question is does anyone have any thoughts or comments on how easy it is to get this recalibrated and what we might need to do? Its a Bendix King KT76a.
Thanks
