12SK7GT Guaranteed US made used/good 1940's, a few stress cracks in metal base (7.5ma)
$ 4.99
12SK7GT Guaranteed used/good 1940's, a few stress cracks in 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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