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AC-tube_Wireless

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ID = 71858
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: McCullough, Frederick, S. Co.; Wilkinsburg, later Sales Company; Pittsburg 
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to AC-tube_Wireless

Base UX-Base (4 Pins (2 thick, USA 1924, UX) 2 Top contacts.
Was used by Radio/TV-reception etc.
Filament Indirect
Description

Wireless (brand) AC Tube with top filament

 


Just Qvigstad
 
wireless_ac.jpg

AC-tube_Wireless
 

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