Power Pentode
The EL11 Vacuum tube is an eight pin tube.
In the German "steel" or all-metal tube series, output
and rectifier tubes were usually made as glass tubes as
before. Hence, with exception of its Y8A "steel-tube"
base, the EL11 is fully identical with the EL3N of the
Philips red series. Telefunken sold this tube also as a
beam-power-tetrode, otherwise it was made as a
true pentode only.
Electrical Data:
Voltage ................................ 6.3 V
Heater Current ......................... 0.9 A
Preferred Substitutes ................. 6E102,
AV1037, EL3N, EL11N