page 1 2 3 EFF51 sheet 1 2 FP date 1948.05.01 19.
EFF51 - Twin H.F. Pentode
page 1 2 3 EFF51 sheet 1 2 FP date 1948.05.01 1948.05.01 1999.07.04 .EFF51 - USW PUSH-PULL AMPLIFIER VALVE
Free Datasheet http://www.datasheet4u.com/ Free Datasheet http://www.datasheet4u.com/ .