Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods Скарлатти Fiocco I am writing during the

I am writing during the first few pianissimo minutes and the surface noise is distracting

They measured 100/78 for Tube One and 102/80 for Tube Two

Tube One measured 45/38 while Tube Two measured 42/41 where minimum (65%) is 32/32 49/49

These tubes were tested using 6BQ7 settings which are the closest US / European tube type to this Soviet tube type

These four milspec Sylvania 5Z4 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair General Electric GE 6SN7 6SN7GTA Vacuum Tubes Copper Support Rods Скарлатти Fiocco I am writing during theThis 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 68 79 for Tube One and 79 72 for Tube Two where minimum (65%) is 50 50 and 100% is approximately 77 77. They have short bases; copper support rods, side horseshoe getters; excellent flashing and 4 22 188 5 and 2 17 188 5 date provenance codes, respectively. As I write, I