6SD7GT Raytheon Tested

RAYTHEON 6SN7 TUBE LOT - 25 TUBES - ALL Test STRONG (70%+) to NOS on an AT1000

One Excellent RAYTHEON 12V6GT Tube NOS NIB Test[%]: 113 TV-7

True NOS NIB Tung-Sol USA 6SE7GT [6SD7 Sub] Silver Round Vacuum Tube 100+%

TUNG-SOL 6SD7-GT VINTAGE ELECTRON TUBE MADE IN U.S.A.

KEN-RAD 6SD7GT Tested

Pair, Sylvania Type 932 Radio/Audio Tubes, Electrometer Pentode

New Unused Sylvania 1229 Electrometer Tube / Old Vintage Ham Radio Low Current