71A Super Silvertone by Sylvania engraved base NOS 1937 (19ma)

71A Super Silvertone by Sylvania engraved base NOS 1937

19ma

Gm=1250

SINGLE TUBE - NOT A PAIR 

(71A=5V @ .25A Filament)
(Typical Characteristics:Vplate=135V, Vgrid=-27, Iplate=17.5ma, Rplate=1.82Kohms
Gm=1650, Mu=3, Rload=3Kohms, Pout=0.4watts)