Tube-number record
EL 12 SPEZ.
0 archive entries
EL 12 SPEZ. is a tube type in the TubeDatabase archive (class: Endpentode). Recorded specifications: brand Telefunken, year 1940, construction Pentode, socket Side-contact (P-base), maximum plate voltage 425 V, and maximum plate dissipation 18 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassEndpentode
BaseSide-contact (P-base)
Filament6.3 V @ 1200 mA
Construction
Primary TypePentode
EnvelopeGlaskolben
Sections1
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage425 V
Plate Dissipation18 W
Grid 2 Voltage425 V
Cathode Current90 mA
H-C Voltage120 V
Audio Performance
Typical THD10%
Power Output45 W
Key Features
- Endpentode für Gegentakt-AB-Schaltung
- Hohen Spannungen
- UKW-Störschwingungen protection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 2x EL 12 spez. Gegentakt AB-Betrieb | 425 V | 10000 | 50000 | — | 42.5 mA |
Application Notes
Zur Sicherung gegen Uberlastung des Schirmgitters bei Aussteuerung soll in der Schirmgitterzuleitung ein Vorwiderstand vorgesehen werden.
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