Tube-number record
4R-HH2
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ClassMedium-mu Twin Triode
BaseNoval (B9A)
Filament4.2 V @ 600 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesTransformer-less television receivers
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation2 W
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Cascade connected RF amplifier
- High sensitivity
- Low noise
- Designed for VHF tuners
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier | 90 V | 8000 | — | 36 | 8.5 mA |
Application Notes
Specifically designed for use as a cascade connected RF amplifier in the VHF tuner of transformer-less television receivers.
Datasheets
Datasheet: 4R-HH2.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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