ZA1
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BrandMarconi
ClassAcorn Pentode
BaseAcorn
Construction
Primary TypePentode
EnvelopeAcorn
Filament / Heater
Absolute Maximum Ratings
Audio Performance
Key Features
- Acorn construction
- Enables H.F. gain above 50Mc
- Short internal leads
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. amplifier | 250V | - | - | - | - |
Application Notes
The acorn pentode can also be used as a frequency changer in conjunction with an acorn triode, suppressor grid injection being employed. As a valve voltmeter ZAI can be mounted at the end of a test prod, thus keeping the live lead very short indeed. Soldered connections must not be made to the valve prongs.
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