Matched Pair Raytheon 6K6 6K6GT Vacuum Tubes Black Plates Clear Bottle Gray Coated Glass Transconductance measured 49

Transconductance measured 49

and if you need just one strong section

Transconductance measured 67/64 for Tube One and 71/69 for Tube Two where minimum (65%) is 50/50

The title basically says it all

These four metal base National Union 6Q7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Raytheon 6K6 6K6GT Vacuum Tubes Black Plates Clear Bottle Gray Coated Glass Transconductance measured 49This matched pair of Raytheon black plate, clear glass 6K6GT tubes was tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts. Tube One drew 21 milliamps' plate current while Tube Two drew 22. 4. Transconductance was 1620 for Tube One and 1730 for Tube Two where new nominal is within one standard deviation of 1900. These tubes have tall bases; black plates; clear bottles and bottom, D getters. As I write, I am