Matched Pair RCA Clear Top 12HG7 12BY7 Vacuum Tubes Valves NOS-Testing Matched Pair 11BM8 oiled and keeping very good

oiled and keeping very good time

Transconductance measured 112%/114% for Tube One and 114%/115% for Tube Two

new in box RCA 6LN8 / LCf80 tubes tested to spec on our Paul Hart-calibrated TV7/U

100% is 77/77

Please rely on the pictures as to the true content of these albums as my Russian is worse than poor

Matched Pair RCA Clear Top 12HG7 12BY7 Vacuum Tubes Valves NOS-Testing Matched Pair 11BM8 oiled and keeping very goodThis new old stock testing matched pair of RCA clear top 12HG7 tubes was tested on our Paul Hart calibrated TV7 U (on the 12BY7 setting) for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 80 while Tube Two measured 82 where minimum (65%) is 46 and 100% is 71. These tubes have anode radiators for cooler operation and longer tube life; side O getters and excellent flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES.