Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing 7 Lot Of Seven Sylvania-LABELED 11BM8 tested to spec

Sylvania-LABELED 11BM8 tested to spec on our Paul Hart-calibrated TV7/U

where (65%) is 43 and 100% is 66

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It has rectangular mica spacers

Tube One measured 43 while Tube Two measured 46 where minimum (65%) is 32 and 100% is 49

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods NOS-Testing 7 Lot Of Seven Sylvania-LABELED 11BM8 tested to specThis new old stock testing matched pair of GE 6SN7GTA dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 76 74 for Tube One and 80 72 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have 4 48 188 5 and 4 43 188 5 date factory codes; tall bases; copper support rods, horseshoe getters and excellent flashing. I have played them in my