Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods Vintage Parts copious flashing and wire snubbers

copious flashing and wire snubbers for increased rigidity for lowered microphonics

Tube Two measured 48 46 56

29 and 30 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25 and 100% is 38

72 and 76 where minimum (65%) is 45

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods Vintage Parts copious flashing and wire snubbersThis 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 53 53 for Tube One and 56 56 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have 4 48 188 5 and 4 43 188 20 date factory codes; copper support rods, horseshoe getters and excellent flashing. I have played them in my Cern Audio phono preamp and they