(!!!) (PAIR) UX-201-A Radiotron Balloon used/good brass pins 1930”s (2.3ma and Gm=700 x 2 tubes)

1 pair) UX-201-A Radiotron Balloon used/good brass pins 1930”s

1 tube) 2.3ma Gm=700

1 tube) 2.3ma Gm=700

NOS Ma = 3ma

NOS Gm = 900

(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