Tube-number record
6868
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BrandFederal Telephone and Radio Company
ClassTraveling Wave Tube
BaseDuodecal
Filament6.3 V @ 2500 mA
Construction
Primary TypeOther / special
EnvelopeMetal
SectionsHelical type wave propagating structure
Filament / Heater
Heater NotesUnipotential oxide impregnated cathode
Absolute Maximum Ratings
Plate Voltage1500 V
Plate Dissipation150 W
Grid 1 Voltage-250 V
Audio Performance
Power Output10 W
Key Features
- All metal envelope
- Helical wave propagating structure
- Forced air cooled
- CW service
- Integral matching circuit
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Power Amplifier | 1200 V | — | — | — | 70 mA |
| Linear Amplifier | 1150 V | — | — | — | 67 mA |
Application Notes
The focusing electrode is a remote cutoff grid suitable for gain control (approx 30 db range). Shell current is the difference between cathode and collector current and should be minimized. Collector should operate 100-200V positive with respect to shell.
Datasheets
Datasheet: 6868.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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