Tube-number record
7688
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BrandCBS
ClassTriple Triode
BaseCompactron
Filament6.3 V @ 450 mA
Construction
Primary TypeTriode
EnvelopeT-7 1/2
Sections3
Filament / Heater
Heater NotesContinuous-wound coil heater
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Continuous-wound coil heater
- Gold plated base pins
- High reliability
- 1000-hour life test
- 5000-hour informational life test
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 100 V | 3100 | 6500 | 20 | 11.8 mA |
| Class A Amplifier | 250 V | 2200 | 7700 | 17 | 10.5 mA |
Datasheets
Datasheet: 7688.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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