SP.42
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BrandMazda
ClassPentode
BaseBritish Octal
Filament4V @ 0.95mA
Construction
Primary TypeScreened Pentode
EnvelopeMetallised bulb, small dimensions
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage200 V
Grid 2 Voltage200 V
Audio Performance
Key Features
- A.C. Mains Screened Pentode
- Designed for video output stage in television receivers
- Metallised bulb
- British Octal Base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operation Point 1 | 200V | 9000 | - | - | 27mA |
| Operation Point 2 | 200V | 9000 | - | - | 20mA |
| Operation Point 3 | 200V | 9000 | - | - | 16mA |
Application Notes
Recommended screen voltage of 115V when used with common D.C. restoring circuits. For video output, an anode load of 3000-4000 ohms is typical depending on synchronising separator requirements.
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