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CV1686

Information - Help 
ID = 65362
       
Country:
Great Britain (UK)
Brand: British Tungsram Radio Works Ltd.
Developer: British Tungsram Radio Works Ltd. 
Tube type:  Signal Diode - one single system   Detector 
  Ca. 1925 up to 1945 very rare. ***
Identical to CV1686 = VT118A_GPO = D418
Similar Tubes
Other characteristic (electr. data):
  CV1687 ; VT118B_GPO

Base Europe 3-Pin B3 (Eu H)
Was used by Military and/or Government
Filament Vf 4 Volts / If 0.18 Ampere / Indirect / Specified voltage AND current AC/DC
Description

Used as detector, rectifier and output tube. 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.

 
Information source Babani, International Radio Tube Encyclopaedia   Pages 78 & 79
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Page 36
 
d418_so~~2.png
CV1686: Fin Stewart
Fin Stewart

 

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