HRM

My ADF antenna is still mounted underneath my Mooney, it's a combined sense and loop unit, a Bendix KING KA-44B .

My audio panel and MB receiver is the one the plane was fitted with in 1965. It's a Pietsch AP-10 switch unit, which is just a set of switches, some relays and diodes. Still works fine. ATC always gives me a Lima Charlie on clarity and reception and with a Bose A20 the unit is state-of-the-art.

My MB receiver is a King KR-20, which is neat because the receiver is actually in the antenna on the AC belly. All that is in the panel are the three lamps and the control switch.

I think the six-pack thing came about from the FAA since that is what they have in all of their pubs. With the larger panel A/C, it was easy just to lay them out nice and square. I prefer the "wagon-wheel" scan with the AI at the center, which is just what my panel gives me.