4 Canadian Number / Type 76 #76 Vacuum Tubes Valves Lot Of Four 12SF7 OM Transconductance measured 68/64 where minimum

Transconductance measured 68/64 where minimum (65%) is 36/36

RCA-BRANDED 6HG8 / ECF86 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 1860 micromhos and drew 23

1 milliamps' plate current

6 milliamps' plate current and measured 1610 micromhos

4 Canadian Number / Type 76 #76 Vacuum Tubes Valves Lot Of Four 12SF7 OM Transconductance measured 68/64 where minimumThis quad of Canadian MANUFACTURED type 76 triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 36, 44, 52 and 60 where minimum (65%) is 36 and 100% is 55. These tubes have black, rounded plates and excellent flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL