Tube-number record
6945
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BrandSylvania
ClassBeam Power Pentode
BaseSubminiature
Filament6.3 V @ 350 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeT-3
SectionsSingle
Filament / Heater
Heater NotesDesigned for regulations of heater voltage to its center rated value of 6.3V.
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation3 W
Grid 2 Voltage150 V
Grid 1 Voltage-55 V
Cathode Current40 mA
H-C Voltage200 V
Audio Performance
Typical THD11%
Power Output1.22 W
Key Features
- Guided missile service
- Subminiature design
- High resistance to interelement leakage
- Stable performance under mechanical shock
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Connected (Average) | 100 V | 3500 | 20000 | — | 25 mA |
| Triode Connected (Average) | 100 V | 3700 | 1500 | 5 | 26 mA |
| Class A1 Amplifier (Single Tube) | 250 V | — | — | — | 14.2 mA |
Application Notes
Specifically designed for guided missile service where severe mechanical shock, vibration, and high temperature are encountered. Reliability is tied to heater voltage regulation.
Datasheets
Datasheet: 6945.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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