Tube-number record
7438
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BrandMullard
ClassPentode
BaseB8D / B8F
Filament6.3 V @ 175 mA
Construction
Primary TypePentode
EnvelopeT-3
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage190 V
Plate Dissipation1 W
Grid 2 Voltage190 V
Grid 1 Voltage-50 V
Cathode Current12 mA
H-C Voltage100 V
Audio Performance
Key Features
- Reliable
- Subminiature
- Short suppressor base pentode
- Flying leads
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 100 V | 2500 | — | 34 | 3 mA |
Application Notes
For use in guided weapons.
Datasheets
Datasheet: 7438.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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