(!!!) (Recommended PAIR 1953) JAN-CW-231D Western Electric NOS 1953 (1.5ma and 1.5ma)
$ 139.99
1 pair) JAN-CW-231D WE NOS yellow printed bases original boxes 323=1953
1 tube) 1.5ma Gm=400 (323=1953)
1 tube) 1.5ma Gm=400 (323=1953)
Tested on Amplitrex
Vplate=90V
Vgrid=-3V
Good Ma = 1.5-2.1ma
Good Gm = 400-500
General Information
3V Filament @ 60ma, Vplate=90V, Iplate=2.1ma, Mu=8.4, Gm=510, Rp=16Kohms, Pout=4.5mW
Similar to UV-199 and 864
See more: vacuum tube
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 (Recommended PAIR 1953) JAN-CW-231D Western Electric NOS 1953 (1.5ma and 1.5ma) "Pin It")