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(!!) (Best Overall Pair) UX-201-A RCA Radiotron Balloon used/good 1930's (2.7ma and 2.9ma)

(!!) (Best Overall Pair) UX-201-A RCA Radiotron Balloon used/good 1930's (2.7ma and 2.9ma)

$ 69.99

1 pair) UX-201-A Radiotron Balloon used/good 1930's in white boxes

1 tube) 2.7ma and Gm=700 brass pins

1 tube) 2.9ma and Gm=800

 

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

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