Home » UX-201-A RCA Radiotron Balloon tests like new 1930's (read review)

UX-201-A RCA Radiotron Balloon tests like new 1930's (read review)

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0 pair) UX-201-A RCA Radiotron Balloon tests like new 1930's in white boxes - nice condition

1 tube) 3.0ma Gm=800

1 tube) 3.4ma Gm=750

NOS Ma = 3ma

NOS Gm = 900

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

- Crosley C5 1926

Class A Amplifier:
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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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