VACUUM PENTODE POWER OUTPUT LAST STAGE AUDIO
EL12 spez = EL12 sp
Similar tube Other base and data slightly different: EL12N
Multiple differences or of other kind: EL12
First serie 1939 Tube leaflet collection E.Erb Analysis by original leaflets (T8)
Socket German Steel Y8A Top contact with a cap
Filament heater Vf 6.3 Volt / If 1.2 Ampere / Indirect / Parallel, ~ = (AC/DC)
Description Launched 1938 by Telefunken.
Predecessors / Vorgänger: AL5; Successors / Nachfolger:~EL34
18 W power output pentode with almost twice the sensitivity as the AL5, intended for applications designed for normal output pentodes as the EL11, but where twice the output power is desired.
A suffix /xxx indicates the max. voltage this tube is especially selected for, otherwise it's 250 V.
The EL12 spez. has a plate top cap. The EL6 is a parallel type with P base.
box 207