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NPL

Información - Ayuda 
ID = 28654
       
 
   
Tipo:  Gas Triode 
  <1925 no serial production
Idéntica a NPL

Filamento
Descripción There is little evidence that this valve was actually built. The National Physical Laboratory at Teddington (NPL) certainly carried out experiments on thermionics and it is possible that Stanley's description in 1919 refers to such an experimental valve.
Tyne suggests that it could be a reference to the White valve. 
Literatura Saga of the Vacuum Tube, Tyne   page 217

 

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