Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods NOS-Testing 14AF7 Dual Triode They tested 73 and 86

They tested 73 and 86 where minimum (65%) is x and 100% is y

sutured tops

new in box Hytron 6SA7GT tube tested to spec on our Paul Hart-calibrated TV7/U

3 dB / -83

Matched Pair General Electric GE 6SN7 6SN7GTB Vacuum Tubes Copper Support Rods NOS-Testing 14AF7 Dual Triode They tested 73 and 86This new old stock TESTING 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. Transconductance measured 76 72 for Tube One and 78 76 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have side, harp getters; tall bases; copper support rods; a round and square hole in each mica spacer; great flashing and 61 39 188 5 and 62 04 188 5 date