Does anyone recognize this round object under the belly of a PA-24?
From a Comanche parts catalog, it's the ADF loop antenna (item 45) minus the aero cover (30):
$\begingroup$ Thanks, especially for the link. I think I'll be referring to that a lot. $\endgroup$– JeffApr 26, 2021 at 16:15
That is probably the ADF loop antenna. To read properly, it must be installed so the little airplane's nose points in the direction of flight.
$\begingroup$ I dont have the long sense antenna (at least not on the exterior) which makes sense, since I dont have an operable ADF any longer. And the little airplane is facing the right way. $\endgroup$– JeffApr 26, 2021 at 16:15