2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 This almost-perfectly-matched pair of Sylvania

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

This Tung-Sol 13DE7 tested to spec on our Paul Hart-calibrated TV7/U

nearly-perfectly-matched pair of JJ 6V6S output tubes was tested on our Maxi-Matcher 400 volts on the plates and a bias of -36 volts for shorts

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

2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 This almost-perfectly-matched pair of SylvaniaThis 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