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CF-185_DeForest-UV

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ID = 69017
       
Country:
United States of America (USA)
Brand: DeForest-Tubes
Developer: DeForest-Tubes 
Tube type:  Triode, vacuum   Audio Frequency 
  <1925 very rare. ***
Identical to CF-185_DeForest-UV
Similar Tubes
Normally replaceable-slightly different:
  D_Moorhead-UV
Other base:
  CF-185 ; D_Moorhead-E12

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 6 Volts / If 0.84 Ampere / Direct / Battery =
Description

This tube is a successor to the CF-185, which was fitted with a Candleabra (E12) screw base, It was first made by de Forest in 1921. The base of this tube is nickel plated brass. As with the earlier tube, the grid is a fine wire wound on a glass frame. It has an oxidised tungsten filament and the anodes are sheet tungsten. The tube was rebased UV for the US Signal Corps. 

 
de_forest_cf185_uv.jpg
CF-185_DeForest-UV: Lauren Peckham collection 1977
Fin Stewart

 
uv_triode_tube~~14.png
CF-185_DeForest-UV: Fin Stewart
Fin Stewart

 

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