What I remember was that the RF head (turret) would hang
up once in a while due to poor alignment between the
contacts, fixed and on the head. Was a bearcat to fix
and usually meant replacing the head as by the time the
ops turned it in for repair, the contacts were shot.

Oh well, been a long time for me too........still got
couple 390A's though, great fun.

73 to all

Doug, K7YD