Tube-number record
ESF/E13F
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BrandPhilips
ClassPentode
BaseSpecial / none
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass with metallisation
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Audio Performance
Typical THD10%
Power Output0.7 W
Key Features
- Small size
- Light weight
- Robust construction
- Universal valve for transceivers
- Operates down to 3 metres
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Amplifier | 200 V | 2400 | 900000 | — | 4.5 mA |
Application Notes
The ESF features a hand grip for replacement; the E13F is the version without the hand grip. Can be used as RF, IF, or AF amplifier, frequency changer, oscillator, detector, or output valve.
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