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F109A_UX4

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ID = 25621
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to F109A_UX4 = X-226 = UX226
Similar Tubes
Normally replaceable-slightly different:
  26 ; CX326 ; M26
Other base:
  F109A
First Source (s)
Aug.1930 : Philips Bulletin R1164, p. 20 & 32
Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 1.5 Volts / If 1 Ampere / Direct / Specified voltage AC/DC
Description

This tube is the equivalent of the RCA UX226

 
Dimensions (WHD)
incl. pins / tip		 45 x 108 x mm / 1.77 x 4.25 x inch
Weight 47 g / 1.66 oz
Information source - - Manufacturers Literature   Philips Australia RIF26
- - Manufacturers Literature   1940 tube catalog
-- Collector info (Sammler)
Babani, International Radio Tube Encyclopaedia
f109_ux4_so.png F109A_UX4: ARRL Handbook 1972
Anonymous 10 Collector

Just Qvigstad 		f109af209af242data_2.png
F109A_UX4: own collection
Peter den Boer † 2025

Collection of

Jose Vigil (RA)
 
philipsf1092_1_1.jpg

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