Tube-number record
M.V.S./PEN.
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BrandCossor
ClassVariable Mu H.F. Pentode
Base7-pin (non-miniature)
Filament4 V @ 1 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage200 V
Grid 2 Voltage100 V
Grid 1 Voltage-20 V
Audio Performance
Key Features
- Variable-mu characteristic
- Separate suppressor grid pin (7-pin base)
- Manual or automatic volume control
- Frequency changing capability
- Decrease gain and flatten tuning by negative suppressor grid potential
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Va 200, Vag 100, Vg 0 | 200 V | 3000 | — | — | — |
| Va 200, Vag 100, Vg -1.5 | 200 V | 2200 | — | — | — |
Application Notes
Particularly useful as a high frequency or intermediate frequency amplifier. Suppressor grid is brought out to a separate pin in the seven-pin base type. Also available with five-pin base where the suppressor grid is connected to cathode.
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