(!!!) 201A Silvertone Balloon NOS 1930 era (1.8ma and Gm=500)

201A Silvertone Balloon NOS 1930 era

1.8ma

Gm=500

Good used Ma = 2.0-2.5ma

Good used Gm = 700

(Filament=5V @ 250ma, Vplate max=135V)

– Crosley C5 1926

Class A Amplifier:
—————–
Plate Voltage = 90
VGrid No. 1 Voltage -4.5V
Amplification Factor (mu) = 8
Plate Resistance (approx) 11Kohms
Transconductance = 725mhos
Plate Current = 2.5 mA