Tube-number record
7689
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BrandCBS Electronics
ClassHigh-Mu Triple Triode
BaseCompactron
Filament6.3 V @ 450 mA
Construction
Primary TypeTriode
EnvelopeT-7 1/2
Base MaterialMiniature button, 12-pin
Sections3
Filament / Heater
Heater NotesContinuous-wound coil heater
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation1.1 W
Grid 1 Voltage55 V
H-C Voltage200 V
Audio Performance
Key Features
- Extreme reliability
- Stable characteristics
- Long life
- Continuous-wound coil heater
- Gold plated base pins
- Stronger structures
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Each Section) | 100 V | 1250 | 80000 | 100 | 0.5 mA |
| Class A Amplifier (Each Section) | 250 V | 1600 | 62500 | 100 | 1.2 mA |
Application Notes
Designed and tested for use in measurement test equipment, instrumentation, and applications where extreme reliability and long life are required.
Datasheets
Datasheet: 7689.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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