Actually, receiving am with a bfo is fine. You are just copying 1/2 of the
sideband. The Drake 1A came out when am was still popular and no am
detector or switch. Called exhalted carrier or something like that.

I think there were a number of rigs that use the 11 pin plug. The Johnson
products, including the Ranger and Pacemaker and Valiant, if I recall
correctly. But, do not shoot me, please, if I am wrong. My wife points out
my faults often.

73, Colin K7FM