Matched Pair RCA Clear Top 12HG7 12BY7 Vacuum Tubes Valves NOS-Testing Matched Pair 11BM8 dimple sheet getter

dimple sheet getter

Tube One drew 14

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

7 milliamps and transconductance was 1510 micromhos for Tube One

It has a top O getter

Matched Pair RCA Clear Top 12HG7 12BY7 Vacuum Tubes Valves NOS-Testing Matched Pair 11BM8 dimple sheet getterThis 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.