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ID = 35282
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-3volt
Similar Tubes
Heater different:
Successor Tubes 401_McCullough  

Base UV-Base (4 Pins+Bayonet, USA 1914 WE) 2 Top contacts.
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 1 Ampere / Indirect
Dimensions (WHD)
incl. pins / tip
41 x 130 x mm / 1.61 x 5.12 x inch
Weight 46 g / 1.62 oz
Information source - - Manufacturers Literature   
Tube Lore (II)   p. 33
-- Collector info (Sammler)

uv4_mccullough.png 400_McCullough-3volt: own collection
Peter den Boer

Just Qvigstad
400_McCullough-3volt: leaflet in tubebox
Otto Frosinn

More ...

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