Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing June 18 2025 Tube Two Transconductance: 2610

Tube Two Transconductance: 2610

They have engraved / hot-stamped bases on is Champion-branded and the other is Zenith

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This lot of two Ken-Rad-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing June 18 2025 Tube Two Transconductance: 2610This new old stock testing, perfectly matched pair of Sylvania 6SJ7s was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 64 for both tubes where minimum (65%) is 40. They have DM and 939 date codes. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT.