2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 new in box RCA 6GE5

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

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

They have Y5E and 9-22 codes

This pressing has very-light surface noise audible only in quiet passages

2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 new in box RCA 6GE5This 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