Got my GE 12BH7's in the mail and plugged them into the Clarinet. No resistor change. Sound slowed down, kind of a drudge. I looked around and saw a post about making the 12BH7 the top tube in any totem so I plugged in an Amperex on the bottom and left the 12BH7 on top and it is nice.
More bass than before. No loss on top or in the mids. Seems more controlled. Very colorful, very powerful. Good to go.
Set in the Clarinet now is: Bendix, GE 12BH7, Amperex 12AU7.
Seeing what the 12BH7 does, how heavy it _can_ be I will try those steely sounding Sovteks or the vibrant gold pin Tung Sols with it in the Cornet2.