2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 TV7/U readings are in (parenthesis)

TV7/U readings are in (parenthesis)

This almost-perfectly-matched pair of Sylvania black plate 6C4 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Minimum (65%) is 32/32 and 100% 66/66

new in box RCA 6GE5 tubes tested to spec on our Paul Hart-calibrated TV7/U

I have played it in one of my ArtSound 805 monoblocks and it sounds excellent

2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 TV7/U readings are in (parenthesis)This lot of two RCA Cunningham Radiotron 2B7 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas, emissions and transconductance. There were no shorts or gas and they tested as follows: Tube one measured 30 in its triode section where minimum (65%) is 25 and 100% is 38. Its diodes measured 57 and 54, respectively, where minimum (65%) is 40 40 and 100% is 61 61. Tube Two (triode): 32 Tube Two (diodes): 60 42 WE HAVE SCORES OF THOUSANDS