5691

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BrandRCA

ClassIndustrial Twin-Triode Amplifier

Primary TypeTriode

Base Materialnon-hygroscopic

SectionsTwin

Heater NotesHeaters are made of pure tungsten for high mechanical strength; enclosed in sleeves to ensure a good mechanical and electrical bond.

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

Design features of industrial-type tubes specifically for high mechanical strength and reliability under vibration and shock.

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