Tube-number record
1F1
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1F1 is a tube type in the TubeDatabase archive (class: Current-Regulating Ballast Tube). Recorded specifications: brand National Union, construction Other / special, socket 4-pin, and maximum plate voltage 3.2 V. The archive does not yet hold a photographed example of this type.
BrandNational Union
ClassCurrent-Regulating Ballast Tube
Base4-pin
Construction
Primary TypeOther / special
EnvelopeST-12
Filament / Heater
Absolute Maximum Ratings
Plate Voltage3.2 V
Audio Performance
Key Features
- Current-regulating device
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Current Regulation | 0.7 V | — | — | — | 720 mA |
Datasheets
Datasheet: 1F1.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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