"bradvk2qq" wrote in message
oups.com...
Buy an aircraft ADF receiver. The Bendix/King KR87 is an excellent
unit. Don't forget to install the loop antenna on a suitably large
groundplane and be sure to correct for QE (Quadrantal Error).

Brad.

A loop will not require a ground pane- in fact a local ground plane
(aircraft's conductive body) is what causes quadrantal error.
As long as your loop is well balanced, showing deep nulls, there should not
be a problem.
With my 7' rotatable shielded loop ( shielding serving the purpose of
balance, no improvement in S/N) I can see over 20dB nulls on ground wave AM
stations during the day.

Dale W4OP