http://www.antiqueradios.com/forums/viewforum.php?f=8&sid=ce51f2c811ce0fa3067c66297fbab04f
And then you may mean this place?
http://www.tone-lizard.com/Jackson648.html
Bill VA
:Does anyone know who the Hickok tube tester expert is? I had his site book marked before my hard drive decided to head south and now I cant seem to find his site. Thanks
:Greg