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CV1687

Informazioni - Aiuto 
ID = 65364
       
Stato:
Gran Bretagna (Regno Unito)
Produttore: Tungsram (Tube Brand), Tungsram Electric Lamp Works (Great Britain), Ltd.; London, British Tungsram Radio Works, Ltd.; London
Progettista: Tungsram (Tube Brand), Tungsram Electric Lamp Works (Great Britain), Ltd.; London, British Tungsram Radio Works, Ltd.; London 
Tipo:  Diodo per segnali, singolo   Detector 
  Ca. 1925 up to 1945 very rare. ***
Identico a CV1687 = D418 = VT118B_GPO
Valvole simili
Other characteristic (electr. data):
  CV1686 ; VT118A_GPO
Zoccolo Europe 3-Pin B3 (Eu H) Top contact with a cap.
Utilizzata per Militaire et/ou Services Publics
Filamento Vf 4 Volt / If 0.18 Ampere / Indirect / Specified voltage AND current AC/DC
Descrizione

Tube used as a detector, rectifier and output. No grid pin

The CV1686 and CV1687 are selected versions of the D418. They differ in anode impedance, the CV1686 has an impedance range of 2250 to 3000 ohms; the CV1687 a range of 3000 to 3750 ohms.

 
Bibliografia Babani, International Radio Tube Encyclopaedia   Pages 78 & 79
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 36
d418_so~~3.png CV1687: Fin Stewart
Fin Stewart

Just Qvigstad
 
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