12SK7GT Wizard by Sylvania used/good 1940”s (7.5ma)

12SK7GT Wizard by Sylvania used/good 1940”s

7.5ma

Gm=1500

Tested on Amplitrex:

Good used Ma range 7 – 8ma

Good used GM range 1500-1800

Vplate = 250V

Vscreen = 100V

Vgrid = -3V

Good used Ma = 7-8ma

Good used Gm = 1500

for:

Collins TCS14 1944