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ID = 13502
United States of America (USA)
Common type USA tube/semicond.
Common type USA tube/semicond. Advance Battery Corp.; Brooklyn Air Castle - tubes Air King - tubes Air Scout - tubes Airhawk - tubes Airline, Super-Airline, Wards (tubes) - see also Montgomery Ward; Chicago, IL Airtron, H. & H. Radio Co.; Newark, NJ Alltron (tube brand), Allan Manufacturing Co.; Arlington and Harrison, NJ Amplitron = Tube brand Apollo Radio Tube Company; New York City, NY, Irvington, NJ Atlantic and Pacific Radio Corporation; New York City, NY Bear Radio Products Corp.; New Jersey Belltone = Tube brand Blackstone Radio Tube; Pawtucket, RI CeCo (tubes), C.E. Mfg. Co. Inc.; Providence, RI Champion Radio Works; Danvers, Massachusetts Claradyne; (Where ?) Continental Corp. (Continental tube brand); Chicago, IL Daven Radio Co. ; Newark (NJ) Diatron (tubes), Diamond Vacuum Products Co; Chicago, IL D-Lux Blue (tube brand) Echotron (tubes); (where ?) Federal Electric and Radio Co.; New York City, NY Fields, Henry; Shenandoah, IA Gloria Tube Works; Newark, NJ Gold Bond (tube brand) Gold-Tone Radio Company; New York City, NY Green Seal (tubes), Air-Way Electric Appliance Corp.; Toledo, OH Greentron (tubes) Hickory (tube brand); (Where ?) Hylon (tubes), brand Hytron; Salem (MA) KMA, May Seed and Nursery Co.; Shenandoah, IA Kwik-lite (Kwiklite), Usona Manufacturing Co.; Toledo, OH Lafayette Radio & TV Corp; New York (NY) Loraco (tubes), George Loring; Chicago Magnatron, Connewey; Hoboken N.J. Music Master Corp. (pre 1927); Philadelphia Myers, E.B. Ltd.; Cleveland (Myers4) Neontron Co.; New York City, NY Neptune Tube Works; Newark, NJ Panama (tubes) Peak (tubes) Pioneer Engineering Laboratories; Jersey City, NJ Powertone (brand): Barfield Electrical Laboratories, New York NY QRS Music Company; Chicago, IL Radio Knight, Chisholm-Barfield Corp; New York City, NY Real Tone Tube Co.; Pawtucket, RI Rextron Radio Corporation (tube brand); Chicago Royal Tube Co.; Pawtucket, RI Silvertone (tubes) - see also Sears; Chicago, IL Songbird (brand) Sovereign Electric & Mfg. Co.; Chicago Sparton-Cardon Tubes; Jackson MI Speed (Cable Radio Tube) Star Radio Tube Co.; Chicago, IL Supertron Manufacturing Co. Inc.; Hoboken, NJ
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Universal 
Identical to 201A = 01A = UX201A = CX301A = ER201A = 201 = RH201A = LS201A = FX201A = CX201A = GSX401A = 4600 = MX201A = JX201A = 3000X1-A = HF201A_perfectron = SW201A = LB-201A = P201A = D201A = NX-201A = RayX-201A = D-201A = EX201A = A_MusicMaster
Similar Tubes
Other shape (e.g. bulb type):
  DX-235 ; M-201A ; RedTop
Normally replaceable-slightly different:
  201A_Magnavox ; 38001 ; A57
Heater different:
Differences not known by us:
First year Aug.1925 Saga of the Vacuumtube, Tyne page 315.
Predecessor Tubes UV201A  

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =

201A is a short name for the UX201A, which was replacing the UV201A in August 1925 (Tyne page 315).

Do not confuse with the 201A by Western Electric, which is completely different!

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Weight 47 g / 1.66 oz
Tube prices 10 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
201A: TreLe
Trev Levick

201A: O.F.
Otto Frosinn

201A: Vintage Electronic catalog
Geri Meier

Usage in Models 4= 1925?? ; 6= 1925 ; 1= 1926?? ; 4= 1926? ; 7= 1926 ; 3= 1927? ; 11= 1927 ; 4= 1928?? ; 3= 1928? ; 11= 1928 ; 9= 1929? ; 10= 1929 ; 1= 1930? ; 8= 1930 ; 1= 1931?? ; 1= 1931

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):84

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