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12SK7GT Guaranteed used/good 1940's, a few stress cracks ion metal base (7.5ma)

12SK7GT Guaranteed used/good 1940's, a few stress cracks ion metal base (7.5ma)

$ 3.49

12SK7GT Guaranteed used/good 1940's, a few stress cracks ion metal base 

7.5ma

Gm=1500

 

Tested on Amplitrex:

Good used Ma range 7.5 - 9ma

Good used GM range 1500-1800

 

Vplate = 250V

Vscreen = 100V

Vgrid = -3V

NOS Ma = 8-9ma

NOS GM = 1900-2000

 

 

 

for:

Collins TCS14 1944

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