Tube-number record
5691
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BrandRCA
ClassIndustrial Twin-Triode Amplifier
Construction
Primary TypeTriode
Base Materialnon-hygroscopic
SectionsTwin
Filament / Heater
Heater NotesHeaters are made of pure tungsten for high mechanical strength; enclosed in sleeves to ensure a good mechanical and electrical bond.
Absolute Maximum Ratings
Audio Performance
Key Features
- Button stem minimizes leakage between stem leads
- Base material is non-hygroscopic to maintain insulation under humidity
- Heaters made of pure tungsten
- Cathode sleeves locked to mica insulators to restrict movement under vibration and shock
- Plated grids to minimize contact potential variations
- Short cross members welded to grid side rods to prevent vertical movement
- Grid side rods fit tightly into mica insulators
- Extra mica insulator prevents getter material leakage paths
- Two getters for good vacuum and long life
- Plates rigidly held in mica insulators by ears
- Completely enclosed design of plates minimizes electron coupling
- Reinforced by five supporting rods and twelve eyelets
Application Notes
Design features of industrial-type tubes specifically for high mechanical strength and reliability under vibration and shock.
Datasheets
Datasheet: 5691.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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