Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing T05 47/43 and 49/50

47/43 and 49/50

GM-Delco-BRANDED 6AX8 tubes tested to spec on our Paul Hart-calibrated TV7/U

This milspec RCA 1642 dual triode was tested on our Paul Hart-calibrated TV7/U

but followed the original score and was recorded in the latter 1950s

72 and 76 where minimum (65%) is 45

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing T05 47/43 and 49/50This new old stock testing, nearly 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 62 for Tube One and 64 for Tube Two where minimum (65%) is 40. They have 4 48 188 5 and 5 43 188 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