PEN. 3520
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BrandMazda
ClassOutput Pentode
BaseStandard 7-pin
Filament35V @ 200mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation8 W
Grid 2 Voltage250 V
Audio Performance
Typical THD5%
Power Output3 W
Key Features
- Indirectly heated
- For use in A.C./D.C. receivers
- High power output from diode drive
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 | 185V | 7000 | - | - | 36.5mA |
| Condition 2 | 200V | 7000 | - | - | 40mA |
Application Notes
In receivers employing A.V.C. it is possible to obtain ample power output without an intermediate L.F. stage by feeding the PEN.3520 direct from the diode. Grid-cathode circuit resistance should not exceed 1 megohm.
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