Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing Plate Cap T27 These six RCA black plate

These six RCA black plate RCA 50B5 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Its diodes measured 33 and 66

INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS -- AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM -- WE WILL LONGER SHIP TO GERMAN ADDRESSES

new in box GE 38HE7 tube tested to spec on our Paul Hart-calibrated Hickok TV7/U

new in box milspec (US Navy) Raytheon CRP-78 number / type 78 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing Plate Cap T27 These six RCA black plateThis 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.