Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing Ultra High Fidelity new in box Tung-Sol 6SD7GT

new in box Tung-Sol 6SD7GT pentode tested to spec on our Paul Hart-calibrated TV7/U

5 record cleaner and then played it on my Rega Planar Three

54 and 65 where minimum (65%) is 48

new in box 6SR7 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Siemens EBF89 / 6DC8 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing Ultra High Fidelity new in box Tung-Sol 6SD7GTThis new old stock testing, perfectly matched pair of GE 6SJ7s was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 57 for both tubes where minimum (65%) is 40. They have 3 13 188 5 and 3 26 188 5 date provenance 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