Tube-number record
7802WB
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7802WB is a tube type in the TubeDatabase archive (class: Medium-Mu, Twin Power Triode). Recorded specifications: brand Industrial Electron, construction Dual triode, base Glass-bonded mica, socket Octal, maximum plate voltage 250 V, and maximum plate dissipation 15 W. The archive does not yet hold a photographed example of this type.
BrandIndustrial Electron
ClassMedium-Mu, Twin Power Triode
BaseOctal
Filament6.3 V @ 2.5 mA
Construction
Primary TypeDual triode
Envelope712 Nonex
Base MaterialGlass-bonded mica
Sections2
Filament / Heater
Heater NotesRange 6.0 to 6.6 Volts
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation15 W
Grid 1 Voltage-300 V
Cathode Current160 mA
H-C Voltage450 V
Audio Performance
Key Features
- Warp-free graphite anodes
- Ceramic element spacers
- Nine mount snubbers
- High perveance
- Ruggedized construction
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Series Regulator | 100 V | 20000 | — | 9 | 140 mA |
Application Notes
Widely used as a passing tube or series regulator in controlled power supplies. Cathode resistors are recommended for equalizing current when paralleled.
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