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(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)
(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)
$ 99.99
1 pair) 201A Silvertone Balloon NOS and like new 1930 era
1 tube) 5.0ma and Gm=900 Silvertone box
1 tube) 4.2ma and Gm=800 white box
NOS Ma = 2.5-3ma+
NOS Gm = 700-900
(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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 (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm) "Pin It")
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