Sylvania 6BU8 Vacuum Tube Tested on TV-7D/U Tube Tester NOS

VINTAGE SYLVANIA 6BU8 VACUUM TUBE TUBES USA TESTED TUB23226

6BU8, Sylvania, Triode-Pentode Vacuum Tube

SYLVANIA TUBE ~ 6BU8 ~ SYLVANIA ~ 6BU8

Pair Sylvania 6BU8 Test NOS/Near 1150/1400gm & 900/1200gm Serious Tubes T183

VACUUM TUBE ~ 6BU8 ~ SYLVANIA / ECG ~ NOS ~ 6BU8

VACUUM TUBE ~ 6BU8 ~ SYLVANIA ~ NOS ~ 6BU8

Sylvania Electronic Vacuum Tube 6BU8 Radio TV Electron Tubes In orig. box