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(!) (#1 231D - BEST SINGLE) 231D Western Electric 1948 with data sheet (2.7ma)

$ 108.88

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

 

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