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L525

Information - Help 
ID = 30863
       
Country:
Great Britain (UK)
Brand: Burndept Ltd. London
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to L525
Similar Tubes
Normally replaceable-slightly different:
  LL525
First Source (s)
1925 : British Radio Valves - The Vintage Years, Thrower p.47 & 113
1925 : History of the British Radio Valve to 1940 p.157
Successor Tubes LL525  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =
Dimensions (WHD)
incl. pins / tip
45 x 104 x 34 mm / 1.77 x 4.09 x 1.34 inch
 
l525_burndept.jpg
L525: own collection
Peter den Boer

More ...
 
b4_base_pins~~145.png
L525: Fin Stewart
Fin Stewart

 
l525_spec.png
L525: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector


from Just Qvigstad

Usage in Models 1= 1926 ; 2= 1927

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):3


Documents about this component
  Article in Wireless World 30-9-1925 1879 KB

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