12SK7GT RCA NOS 1940”s (8.6ma)

12SK7GT RCA NOS 1940”s

8.6ma

Gm=1700

Tested on Amplitrex:

Good NOS mA range 8 – 9ma

Good NOS GM range 1700-2000

Vplate = 250V

Vscreen = 100V

Vgrid = -3V

NOS Ma = 8-9ma

NOS GM = 1900-2000

for:

Collins TCS14 1944