Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing 9002 Septal It is dead quiet when

It is dead quiet when the preamp is muted and has excellent frequency response

This trio of Toshiba output tubes was tested on our Maxi-Matcher in Real World Conditions with 400 volts on the plates and a bias of -36 volts for shorts

top D getters and anode radiators

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

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

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing 9002 Septal It is dead quiet whenThis 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.