(!!!) (Pair) CX-301A Cunningham Balloon used/good 1930-1935 (2.2ma and 2.5ma)
$ 59.99
1 pair) CX-301-A Cunningham Balloon used/good 1930-1935
1 tube) 2.2ma Gm=600 nickel pins
1 tube) 2.5ma Gm=700 brass pins
Good Ma range 2-3ma
NOS Gm = 700-800
(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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 (Pair) CX-301A Cunningham Balloon used/good 1930-1935 (2.2ma and 2.5ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_b517cac2-4391-4c91-a5be-afa588424852.jpg?v=1751921407){kind=link}
 (Pair) CX-301A Cunningham Balloon used/good 1930-1935 (2.2ma and 2.5ma) "Pin It")