Tube-number record
6690
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BrandPhilco
ClassDouble Triode
BaseSubminiature
Filament6.3 V @ 300 mA
Construction
Primary TypeDual triode
EnvelopeT-3
Sections2
Filament / Heater
Heater NotesHeater current value corrected from typical 6690 JEDEC data (OCR suggests 700ma)
Absolute Maximum Ratings
Plate Voltage120 V
Plate Dissipation1 W
Grid 1 Voltage-55 V
H-C Voltage200 V
Audio Performance
Key Features
- Short subminiature
- Medium-mu
- Video region operation
- Severe environmental conditions resistant
- Mechanical shock resistant
- High acceleration resistant
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 100 V | 4800 | 9375 | 45 | 8 mA |
Datasheets
Datasheet: 6690.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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