Electronic Valve - Burndept, Triode, Type L525, circa 1925-1926 Object Reg. No: ST 028613

Trode used as a power amplifier in radios, manufactured by Burndept Wireless Ltd. England in the mid 1920s
5 volt directly heated cathode.
European style 4 pin base
Acquisition Information:
Transfer from Unknown
Discipline: Technology
Dimensions: 109 mm (Length), 46 mm (Diameter)

More information

Tagged with: thermionic electron valves
Themes this item is part of: Engineering Collection, Information & Communication Collection
Primary Classification: ELECTRONICS
Secondary Classification: Vacuum Technology
Tertiary Classification: amplification
Inscriptions: Bulb: Burndept Super Valve/L525/RAL
Base: Burndept Super Valve/Marked "CATHODE D. H."
Manufacturer: Burndept Wireless Ltd., England, Great Britain, circa 1925-1926
References: Website accessed on 18 Dec 2009: http://www.radiomuseum.org/tubes/tube_l525.html
  1. [Book], Mr Gerald Tyne, Saga of the Vacuum Tube, 1987, 1987, 391 Pages
  2. [Book], John Stokes, 70 Years of Radio Tubes and Valves, Vestal, 1982, 1982, 210 Pages

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