Tube-Swap is a mailing list (reflector) open to all radio amateurs for discussion of Vacuum Tubes, vacuum tube projects, repair of tube radios and Sale/Swap of tubes. Anything Vacuum Tube Related 73 de Mike, N9BOR A-1 FISTS MAC SMC ZUT http://www.qsl.net/n9bor di dah dit - The only Roger Beep you'll ever need. Let your fingers do the talking � Morse code. My designated driver is a 12BY7A.