12SK7GT Sylvania branded Westinghouse chrome top NOS 1955 (8.5ma)
$ 12.99
12SK7GT Sylvania branded Westinghouse chrome top NOS 1955 small hairline crack in base
8.5ma
Gm=1800
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
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