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Audion_07-triode

Informazioni - Aiuto 
ID = 74667
       
Stato:
USA (Stati Uniti d'America)
Produttore: DeForest-Tubes
Progettista: DeForest-Tubes 
Tipo:  Triodo a vuoto   Audio Frequency 
Identico a Audion_07-triode
Valvole simili
Sostituita normalmente - piccola diff.:
  Audion_06-triode

Zoccolo Edison (candelabra) 12 mm Other combinations of connections.
Utilizzata per Radio/TV-reception etc.
Filamento Direct / Battery =
Descrizione This tube is the same Audion_06-triode, but without the top moulded cap. There is a long protrusion from the top of the bulb, where the plate and grid wires enter the bulb. this is one of the first double filament tubes made by H. W. McCandless for de Forest and the illustration on page 65 of Tyne's "Saga of the Vacuum Tube (fig.4-15) shows a stout rubber band around the top part of the base. this was available with the tubes and was used to hold the second filament lead-in wire in place, should it need to be used. Tyne states that this tube was owned at one time by J. A. Fleming, inventor of the two electrode tube in 1904. 
Dimensioni
(LxAxP)
incl.pins/tip
x x 25 mm / x x 0.98 inch
Bibliografia Saga of the Vacuum Tube, Tyne   Page 65

 

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