71A Sylvania NOS 1947 (25.3ma)

71A Sylvania NOS 1947

25.3ma

Gm=1900

Tested on Amplitrex

Vplate=180V

Vgrid=-38V

Good Ma = 20ma

Good Gm = 1600-1700

(71A=5V @ .25A Filament)

Mu=3

Rplate=1.82Kohms

Rload=3Kohms

Pout=0.4watts