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Information - Help 
ID = 40358
United States of America (USA)
Brand: Sparton-Cardon Tubes; Jackson MI
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to C-181 = 181

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 / Specified voltage AC/DC

the sidecontacts are the filament connections.

Dimensions (WHD)
incl. pins / tip
52 x 134 x mm / 2.05 x 5.28 x inch

c181.png C-181: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
C-181: own collection
Peter den Boer

Collection of



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