Tube-number record
VIDEO POWER PENTODE
0 archive entries
VIDEO POWER PENTODE is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand Marconi, year 1956, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 9 W. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassPower Pentode
BaseNoval (B9A)
Filament15 V @ 0.3 mA
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 | 170 V | 10000 | 41000 | 410 | 36 mA |
| Pentode Connection | 200 V | 10700 | 42000 | 450 | 40 mA |
| Pentode Connection | 250 V | 11200 | 75000 | 840 | 36 mA |
| Triode Connection | 170 V | 12500 | 1920 | 24 | 40 mA |
| Triode Connection | 200 V | 13500 | 1840 | 25 | 45 mA |
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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