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ID = 30541
United States of America (USA)
Brand: Donle-Bristol Co., Meriden, Conn.
Developer: Donle-Bristol Co., Meriden, Conn. 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to DR-1V
Similar Tubes
Normally replaceable-slightly different:
First year 1927 Saga of the Vacuum Tube, Tyne page 341.
First Source (s)
Sep.1927 : Popular Radio. Ad of Warford Electric
Predecessor Tubes B8_Donle  
Successor Tubes DP-10  

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Direct / Specified voltage AC/DC


Dimensions (WHD)
incl. pins / tip
x 110 x 45 mm / x 4.33 x 1.77 inch
Weight 48 g / 1.69 oz
Information source Saga of the Vacuum Tube, Tyne   Page 341
Tube Lore (II)   Page 32

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