Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes Nagrania XL 0257 new in box US-made milspec

new in box US-made milspec JRC-6AK6 / CV1762 tubes tested to spec on our Paul Hart-calibrated TV7/U

mesh plate number / type 77 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 60 while Tube Two measured 70 where minimum (65%) is 46 and 100% is 71

CHINA IS AN EXCELLENT EXAMPLE

This new old stock-TESTING National Union 807 output tube was tested on our Maxi-Matcher 2 for shorts

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes Nagrania XL 0257 new in box US-made milspecThis 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 46 for Tube One and 48 for Tube Two where minimum (65%) is 40. They have 1 43 188 5 and 3 52 188 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.