VIDEO POWER PENTODE
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BrandMarconi
ClassPower Pentode
BaseB9A
Filament15V @ 0.3mA
Construction
Primary TypePentode
EnvelopeTubular
Base MaterialGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation9 W
Grid 2 Voltage250 V
H-C Voltage150 V
Audio Performance
Key Features
- High mutual conductance
- Primarily designed for use as a video output valve in television receivers
- Free from microphony in normal receiver application
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Connection | 170V | 10000 | 41000 | 410 | 36mA |
| Pentode Connection | 200V | 10700 | 42000 | 450 | 40mA |
| Pentode Connection | 250V | 11200 | 75000 | 840 | 36mA |
| Triode Connection | 170V | 12500 | 1920 | 24 | 40mA |
| Triode Connection | 200V | 13500 | 1840 | 25 | 45mA |
Application Notes
In equipment subject to vibration or shock a retainer is required. Any mounting position. Free air circulation is preferable.
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