Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing VT-132 T02 T52 The diameter across the porcelain

The diameter across the porcelain is approximately 1

I have played it in my Alan Eaton single-ended 45 amplifier with an adapter and it sounds outstanding

Tubes Three and Four measured 73/70 and 75/72

but I do not recommend using them at any other filament voltage than 12

They measured 12/18

Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes NOS-Testing VT-132 T02 T52 The diameter across the porcelainThis 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 59 for both tubes where minimum (65%) is 40. They have 939 and 252 date codes, respectively. 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,