bcowen
Headphoneus Supremus
There are settings for the ECC40 for the Hickok, but it needs an adapter too as there is no mini 8 pin socket. These things get more interesting with each new discovery. The pins are equidistant around the base -- no gap like in a 9-pinner or key like a 6SN7 to indicate socket orientation Instead there's a little bump molded into the bottle, which I expect lines up with a mark or detent on the socket. Now I gotta find an adapter for the Hickok. The settings are entirely different than for a 6SN7, so I'm assuming this adapter plugs into the 9 pin socket...