Tube-number record
3FW7
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BrandToshiba
ClassSubminiature Dual Triode
BaseSubminiature
Filament3.5 V @ 600 mA
Construction
Primary TypeDual triode
EnvelopeSubminiature with shield can
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesSeries string circuit
Absolute Maximum Ratings
Plate Voltage150 V
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Subminiature design
- Shield can with indexing legs
- Medium Mu
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Unit 1 Oscillator | 90 V | 6000 | 6000 | 36 | 7 mA |
| Unit 2 Mixer | 90 V | 9500 | 3800 | 36 | 9 mA |
Application Notes
Designed for use as mixer oscillator in VHF TV and FM tuners. Section 1 is oscillator, Section 2 is mixer.
Datasheets
Datasheet: 3FW7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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