Hytron 6SJ7 Metal Vacuum Tube Tested Strong

Matched Code RCA 6SN7GT tubes. Amplitrex test balanced 88/88 & 111/107 gm. 1951

Zenith 6EM7 Vintage Vacuum Tube Valve IOB Electronic Valve Tested

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

9 Tested Sylvania Chrome Top 6SN7GTB / 6SN7 Vaccum Tubes

RCA NOS 6J5 Vacuum Tube Tested

2x 6SN7GT Mouse Ears Rare Valve -Tested -Nr.6

2595 LOT OF 4 SYLVANIA JAN CHS 6SN7GT VT-231 Vacuum TUBES