Tube-number record
PEN. 3520
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BrandMazda
ClassOutput Pentode
Base7-pin (non-miniature)
Filament35 V @ 200 mA
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 | 185 V | 7000 | — | — | 36.5 mA |
| Condition 2 | 200 V | 7000 | — | — | 40 mA |
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.
Datasheets
Datasheet: PEN3520.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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