Matched Pair RCA Clear Top 12HG7 12BY7 Vacuum Tubes Valves NOS-Testing Matched Pair 11BM8 mica snubbers for increased rigidity

mica snubbers for increased rigidity and lowered microphonics and excellent flashing

new in box Zenith 6LT8 tube tested to spec on our Paul Hart-calibrated TV7/U

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

It has a top O getter

7 milliamps and transconductance was 1510 micromhos for Tube One

Matched Pair RCA Clear Top 12HG7 12BY7 Vacuum Tubes Valves NOS-Testing Matched Pair 11BM8 mica snubbers for increased rigidityThis 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.