(!) (#1 231D - BEST SINGLE) 231D Western Electric 1948 with data sheet (2.7ma)
$ 119.99
1 tube) 231D WE NOS 1948 with 231D data sheet
2.7ma Gm=500 (813=1948)
Tested on Amplitrex
Vplate=90V
Vgrid=-3V
Good Ma = 1.6-2.1ma
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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 (#1 231D - BEST SINGLE) 231D Western Electric 1948 with data sheet (2.7ma)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/231d48.jpg?v=1473882942){kind=link}
 (#1 231D - BEST SINGLE) 231D Western Electric 1948 with data sheet (2.7ma) "Pin It")