Tube-number record
6909
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BrandSYLVANIA
ClassDecade Counter Tube
BaseOctal
Construction
Primary TypeOther / special
EnvelopeT9
SectionsBidirectional Decade Counter
Filament / Heater
Absolute Maximum Ratings
Plate Voltage800 V
Grid 2 Voltage140 V
Cathode Current0.8 mA
Audio Performance
Key Features
- Cold cathode
- Bidirectional decade counter
- Top viewed readout
- 100,000 pulses per second
- Individual base pins for cathodes 0, 5, 8, and 9
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Decade Counting | 400 V | — | — | — | 0.7 mA |
Application Notes
Applications include computing, scaling, counting, frequency dividing, coding, modulating, matrixing, indexing, multiplesing, addition and subtraction.
Datasheets
Datasheet: 6909.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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