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AC_Special

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ID = 76198
       
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   Audio Frequency 
Identical to AC_Special

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Indirect / Specified voltage AC/DC
Description

This tube is shown on the www.bill01A website. It is an indirectly heated triode with a 4 pin UV base. One end of the heater is tied to the cathode, the same scheme as used by Arcturus in their 15 volt tubes. There is no type number marked on the tube so the actual designation is not known.

 
Information source -- Collector info (Sammler)   


Just Qvigstad
 
mccullough_special_bc.jpg

AC_Special
 

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