4BN4
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BrandBrimar
Classminiature medium-mu triode
BaseE7-1 Miniature Button 7-pin
Filament4.2V @ 450mA
Construction
Primary Typetriode
EnvelopeT-5 1/2
Sections1
Filament / Heater
Heater NotesA.C. or D.C.
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Cathode Current20 mA
H-C Voltage100 V
Audio Performance
Key Features
- Coated unipotential cathode
- Medium-mu triode
- RF amplifier for VHF TV tuners
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 150V | 6800 | 6300 | 43 | 9mA |
Application Notes
Intended primarily for use as a radio frequency amplifier in VHF television tuners. Electrical characteristics are similar to those of each section of the 6BZ7.
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