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274A

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ID = 25398
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to 274A
Similar Tubes
Normally replaceable-slightly different:
  4274A ; CV1451

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament Vf 5 Volts / If 2 Ampere / Direct
Description

1.5KV PIV, 235mA. Filament current drain of 5R4, anode current of 5U4.
Electronic Enterprises, STC, WE known manufacturers.

 
Tube prices 2 Tube prices (visible for members only)
Information source Babani, International Radio Tube Encyclopaedia   W.E.Greybar catalog 1933
Tube Lore (I)   
 
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274A: franco antolini
Franco Antolini

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274A: KoBi
Konrad Birkner † 12.08.2014

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274ad.png
274A: KoBi
Konrad Birkner † 12.08.2014

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from Just Qvigstad

Usage in Models 1= 1929?? ; 1= 1933? ; 1= 1934?? ; 2= 1934? ; 1= 1934 ; 2= 1936?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):8


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