(!!) (Best Pair) UX-201-A RCA Radiotron Balloon used/good 1930's (2.5ma and 2.5ma)
$ 69.99
1 pair) UX-201-A Radiotron Balloon used/good 1930's in white boxes
1 tube) 2.5ma and Gm=700
1 tube) 2.5ma and Gm=600
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
See more: vacuum tube
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 (Best Pair) UX-201-A RCA Radiotron Balloon used/good 1930's (2.5ma and 2.5ma) "Pin It")