2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 This matched pair of Philips

This matched pair of Philips Miniwatt PCL82 / 16A8 triode-pentodes s was tested on our Paul Hart-calibrated TV7 for shorts

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

This Tung-Sol 13DE7 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

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

2 RCA 2B7 Cunningham Radiotron Vacuum Tubes Lot Of Two T17 This matched pair of PhilipsThis 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