Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods Fawcett Columbine but the bottle

but the bottle

Tube Two measured 16

gray plates and bottom

TV7/U readings are in (parenthesis)

46 and 50 where minimum (65%) is 35 and 100% is 54

Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods Fawcett Columbine but the bottleThis matched pair of GE 6SN7GTB dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and transconductance measured as follows: Tube One: 75 70 Tube Two: 79 74 Bogey: Minimum (65%) is 50 50; 100% is 77 77 Physical Characteristics: Bases: tall Bottles: medium height Date Codes: 56 13 and 58 43, respectively EIA Factory Codes: 188 4 and 188 5, respectively Getters: mid bottle, harp