Amperex 6AQ8 ECC85 Vacuum Tube Valve NOS-Testing 6JV8 Milspec This matched pair of RCA

This matched pair of RCA black plate 5763 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

This lot of two RCA Cunningham Radiotron 2B7 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

almost-perfectly-matched pair of Ken-Rad 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance measured 57 for Tube One and 65 for Tube Two where minimum (65%) is 36 and 100% is 55

Amperex 6AQ8 ECC85 Vacuum Tube Valve NOS-Testing 6JV8 Milspec This matched pair of RCAThis new old stock testing German Amperex MANUFACTURED, GE LABELED 6AQ8 ECC85 tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 78 80 where minimum (65%) is 50 50 and 100% is 77 77. It has excellent flashing; sutured tops; copper support rods and a top, O getter. I have played it in my Schiit Vali 2 headphone amp and it sounds great. WE HAVE SCORES OF THOUSANDS OF VACUUM