18Ф5П
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BrandUSSR
ClassTriode-Pentode
BaseNoval
Filament18V @ 300mA
Construction
Primary TypeTriode-Pentode
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesSeries heater connection
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation9 W
Grid 2 Voltage250 V
Cathode Current75 mA
H-C Voltage200 V
Audio Performance
Key Features
- Indirectly heated cathode
- Designed for frame scanning units
- Low mass
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 100V | 3900 | - | 65 | 3.5mA |
| Pentode Section | 185V | 7500 | - | - | 45mA |
Application Notes
Specifically designed for frame scanning in TV receivers with series-connected heater circuits.
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