1 pair) JAN-CW-231D WE NOS yellow printed bases original boxes 323=1953

1 tube) 1.8ma Gm=500 (323=1953)

1 tube) 1.8ma Gm=500 (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