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DA4

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ID = 50878
       
Country:
United States of America (USA)
Brand: Donle-Bristol Co., Meriden, Conn.
Developer: Donle-Bristol Co., Meriden, Conn. 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to DA4

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Direct / Battery =
Description This was a high mu possibly made for the Donle for the "Truphonic Amplifier". An article on page 11 of Radio World September 18th, 1926 describes the amplifier he developed in 1926. This shows a three tube circuit diagram but does not mention the type of tubes used. 
Dimensions (WHD)
incl. pins / tip
37 x 104 x 35 mm / 1.46 x 4.09 x 1.38 inch
Weight 46 g / 1.62 oz


Just Qvigstad

Collection of

 
da4donle.jpg

 

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