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EF37

Information - Help 
ID = 10057
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Developer: Mullard Radio Valve Co. Ltd.;  
Tube type:  Vacuum Pentode   Audio Frequency 
Identical to EF37
Similar Tubes
Normally replaceable-slightly different:
  CV1404
Other class quality (otherwise equal):
  CV358 ; EF36 ; EF37A
First year 1942 -- Collector info (Sammler)

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf) Top contact with a cap
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Parallel / series AC/DC
Description low microfonic version of the EF36 
Text in other languages (may differ)
Tube prices 3 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  ef37.png
  EF37: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
ef37_philips.jpg
EF37: Private collection [PT]
Piotr Trybuchowicz

 
oc10_1.png
EF37: RTT 1974 (Franzis) 13. Auflage
Martin Renz

 

Usage in Models 1= 1942? ; 1= 1945?? ; 2= 1947? ; 1= 1947 ; 1= 1948?? ; 2= 1948 ; 2= 1949? ; 1= 1956??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11


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