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ID = 57220
United States of America (USA)
Brand: Sparton-Cardon Tubes; Jackson MI
Developer: Sparton-Cardon Tubes; Jackson MI 
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to AC-373 = S27
Similar Tubes
Other base:
Predecessor Tubes AC-detector_Sparton  
Successor Tubes C401  

Base UX-Base (4 Pins (2 thick, USA 1924, UX) 2 Sidecontacts.
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 1.3 Ampere / Indirect / Specified voltage AC/DC

AC detector /amplifier. The sidecontacts are the filament connections. This tube is a short bulb version of the 401 and wit side connections on the base

Dimensions (WHD)
incl. pins / tip
44 x 120 x 45 mm / 1.73 x 4.72 x 1.77 inch
Information source Tube Lore (II)   p. 35
-- Collector info (Sammler)   

181_373_401base~~1.png AC-373: own collection
Peter den Boer

Just Qvigstad
Usage in Models 1= 1926

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of



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