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L42B

Information - Help 
ID = 22291
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  REGULATOR-/CONTROL-TUBE (general) 
Identical to L42B
Base Octal (Int.Octal, IO) K8A, USA 1935
Filament
Description used in 110V AC-DC Sets 
Text in other languages (may differ)
Information source Ballast Tube Handbook, The   
 
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L42B
Emilio Ciardiello
 

from Just Qvigstad
Usage in Models 1= 1936? ; 5= 1937 ; 1= 1938? ; 7= 1938 ; 1= 1939 ; 1= 1946??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):16
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