I'm scouting a B&K rejuvenator. I know from other posts that the #23 adapter is the one to have, but some WG7000 series need a #31. Can anyone tell from the photo which one I need for the tube on this WG7601?
Well, here's a better shot of the neckboard (with 8 pins) and the tube ID, both of which should confirm that I do, in fact, need the #31 adapter. Thanks, all!