Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing 9002 Septal milspec GE JG-6X4WA tested to

milspec GE JG-6X4WA tested to spec on our Paul Hart-calibrated TV7/U

It measured 42/49 where minimum (65%) is 50/50 and 100% is 77/77

new in box US-made 6F7 tubes tested to spec on our Paul Hart-calibrated TV7/U

These tubes have copper support rods

It was dead quiet when the CD player is paused and had excellent frequency response

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing 9002 Septal milspec GE JG-6X4WA tested toThis 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 77 for both tubes where minimum (65%) is 40. They have 56 26 188 4 and 61 26 188 4 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.