210 V.P.T.
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BrandCossor
ClassVariable Mu H.F. Pentode
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide Coated
Absolute Maximum Ratings
Plate Voltage150 V
Grid 2 Voltage80 V
Grid 1 Voltage-9 V
Audio Performance
Key Features
- Variable-mu screened grid
- Interposed extra grid between screening grid and anode
- Automatic volume control compatible
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. Amplifier | 150V | 1100 | - | - | 2.9mA |
| H.F. Amplifier with Bias | 150V | - | - | - | 1.5mA |
Application Notes
Suited for use as an H.F. amplifier or as an I.F. amplifier in battery superheterodyne receivers. Can deliver larger output without risk of rectification than ordinary variable-mu valves.
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