Tube-number record
6658
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BrandFederal Telephone and Radio Company
ClassTravelling Wave Tube
BaseDuodecal
Filament6.3 V @ 1800 mA
Construction
Primary TypeTravelling Wave Tube
EnvelopeMetal
SectionsSingle
Filament / Heater
Heater NotesUnipotential oxide coated cathode
Absolute Maximum Ratings
Plate Voltage1500 V
Plate Dissipation100 W
Grid 1 Voltage-200 V
Audio Performance
Key Features
- Helical type wave propagating structure
- Forced air cooled
- Integral matching circuit
- All metal envelope
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Power Amplifier | 1100 V | — | — | — | 7 mA |
| Linear Amplifier | 1000 V | — | — | — | 42 mA |
Application Notes
The shell is normally operated at ground potential. Precautions must be taken to insure that high voltage is not applied in the absence of magnetic field.
Datasheets
Datasheet: 6658.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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