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400_McCullough-4volt

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ID = 56873
       
Country:
United States of America (USA)
Brand: McCullough, Frederick, S. Co.; Wilkinsburg, later Sales Company; Pittsburg
Developer: McCullough, Frederick, S. Co.; Wilkinsburg, later Sales Company; Pittsburg 
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to 400_McCullough-4volt
Similar Tubes
Heater different:
  400_McCullough-3volt
Base UV-Base (4 Pins+Bayonet, USA 1914 WE) 2 Top contacts.
Was used by Radio/TV-reception etc.
Filament Vf 1 Volts / If 4 Ampere / Indirect / Specified voltage AC/DC
Description

The McCullough type 400 was made in two types. 1) A400, which was for detector and amplifier use and 2) for RF use. Neither the tubes or boxes located show this difference and it remains a mystery why this is so.

 
Dimensions (WHD)
incl. pins / tip		 x 130 x 46 mm / x 5.12 x 1.81 inch
Weight 41 g / 1.45 oz
Information source - - Manufacturers Literature   
Tube Lore (II)   p. 33
-- Collector info (Sammler)
uv4_mccullough~~1.png 400_McCullough-4volt: own collection
Peter den Boer

Just Qvigstad 		usa_mccullough_tube_datasheet_a.png
400_McCullough-4volt: tube box insert
Alan Scott Douglas † 16.11.15
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