Matched Pair Sylvania 6SN7 6SN7GT Vacuum Tubes Black Ladder Plates 6680 I have played it in

I have played it in my Alan Eaton single-ended 45 amplifier (with adapters

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This lot of two Ken-Rad-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance (TV7/U): 54/51

Matched Pair Sylvania 6SN7 6SN7GT Vacuum Tubes Black Ladder Plates 6680 I have played it inThis matched pair of Sylvania 6SN7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 50 60 for Tube One and 57 57 for Tube Two where minimum (65%) is 50 50 and 100% is approximately 77 77. These tubes have black ladder plates which are staggered to the right when viewed head on; coarsely crenelated mica spacers; copper support rods; dimple sheet