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ID = 73039
United States of America (USA)
Brand: CeCo (tubes), C.E. Mfg. Co. Inc.; Providence, RI
Developer: CeCo (tubes), C.E. Mfg. Co. Inc.; Providence, RI 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to S27 = AC-373 = 401
Similar Tubes
Other base:

Base UX-Base (4 Pins (2 thick, USA 1924, UX) 2 Sidecontacts
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 1.1 Ampere / Indirect / Parallel, (AC/DC)

This tube was specially designed by CeCo for replacement of Kellogg or Sparton a/c tubes. It was essentially a 227 but with a 3 volt filament and heater connections from pins on the side of the tube. It was introduced in 1928 but had a relatively short commercial life.

Literature - - Manufacturers Literature   
-- Collector info (Sammler)   
S27: Bill Condon collection with permission from Mrs V Condon
Fin Stewart


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