(!!!) (MATCHED QUAD) JAN-CW-231D Western Electric NOS 1953 (1.6/1.6/1.6/1.5ma) 1-2% matched
$ 249.99
1 matched quad) JAN-CW-231D WE NOS yellow printed bases original boxes 323=1953
1 tube) 1.6ma Gm=400 (323=1953)
1 tube) 1.6ma Gm=400 (323=1953)
1 tube) 1.6ma Gm=400 (323=1953)
1 tube) 1.5ma Gm=400 (323=1953)
Tested on Amplitrex
Vplate=90V
Vgrid=-3V
Good Ma = 1.5-2.0ma
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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 (MATCHED QUAD) JAN-CW-231D Western Electric NOS 1953 (1.6/1.6/1.6/1.5ma) 1-2% matched&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/7_a96a6357-faec-47ad-a29f-7323735cf044.jpg?v=1603209278){kind=link}
 (MATCHED QUAD) JAN-CW-231D Western Electric NOS 1953 (1.6/1.6/1.6/1.5ma) 1-2% matched "Pin It")