Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes Valves NOS-Testing March 26 2023 new in box Hytron 35L6

new in box Hytron 35L6 tubes tested to spec on our Paul Hart-calibrated TV7/U

The performance is excellent and heart-felt

Transconductance measured 40/40 for Tube One and 42/46 for Tube Two where minimum (65%) is 32/32

I have played it in my Bottlehead Crack headphone amplifier and it sounds outstanding

Matched Pair Sylvania 6SJ7 6J8P Vacuum Tubes Valves NOS-Testing March 26 2023 new in box Hytron 35L6This new old stock TESTING 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 Tube One and 60 for Tube Two where minimum (65%) is 40. Both have 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.