Tube-number record
EF 13
0 archive entries
EF 13 is a tube type in the TubeDatabase archive (class: HF-Pentode). Recorded specifications: brand VEB Funkwerk Erfurt, year 1953, construction Pentode, socket DIN 41509, and maximum plate voltage 300 V. The archive does not yet hold a photographed example of this type.
BrandVEB Funkwerk Erfurt
ClassHF-Pentode
BaseDIN 41509
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Grid 2 Voltage300 V
Grid 1 Voltage-1.3 V
Cathode Current10 mA
H-C Voltage100 V
Audio Performance
Key Features
- Rauscharme
- Regelbare
- HF-Pentode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250 V | 2300 | 600000 | — | 4.5 mA |
| Pentode | 100 V | 2300 | 400000 | — | 1.3 mA |
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