Tube-number record
18Ф5П
0 archive entries
18Ф5П is a tube type in the TubeDatabase archive (class: Triode-Pentode). Recorded specifications: brand USSR, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.
BrandUSSR
ClassTriode-Pentode
BaseNoval (B9A)
Filament18 V @ 300 mA
Construction
Primary TypeMulti-section
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 | 100 V | 3900 | — | 65 | 3.5 mA |
| Pentode Section | 185 V | 7500 | — | — | 45 mA |
Application Notes
Specifically designed for frame scanning in TV receivers with series-connected heater circuits.
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