TKF4
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BrandTungsram
ClassPentode
Construction
Primary TypePentode
EnvelopeDom-Kolben
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage135 V
Plate Dissipation0.5 W
Grid 2 Voltage135 V
Grid 1 Voltage-0.2 V
Audio Performance
Key Features
- Batterie Hochfrequenz-Pentode
- Dom-Kolben
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier (90V) | 90V | 700 | 1300000 | 900 | 1.2mA |
| RF Amplifier (135V) | 135V | 800 | 1000000 | 800 | 2.6mA |
Application Notes
Used as an HF pre-amplifier or feedback audion. For audion usage, care must be taken to avoid microphonics. For full output drive, an AF choke can be used instead of the 0.5 MOhm resistor.
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