201A

Common type USA tube/semicond. Castilla; Madrid Ace Electrical Laboratory; Newark, NJ 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 Argon (Tube brand) Arrow Tube Company; Springfield, MA Atlantic and Pacific Radio Corporation; New York City, NY Bear Radio Products Corp.; New Jersey Belltone = Tube brand Blackstone Radio Tube; Pawtucket, RI Buck (tube brand) CeCo (tubes), C.E. Mfg. Co. Inc.; Providence, RI Champion Radio Works; Danvers, Massachusetts Claradyne; (Where ?) Columbia Radio Laboratories Inc. (Columbiatron); New York City, NY Continental Corp. (Continental tube brand); Chicago, IL Daven Radio Co. ; Newark (NJ) Defender (tubes) - see also Sears; Chicago, IL Diatron (tubes), Diamond Vacuum Products Co; Chicago, IL D-Lux Blue (tube brand) Duraco (tubes), Duratron Products Corp.; Union City, NJ Echotron (tubes); (where ?) Everbest Radio Corp.; New York, NY Falck (only tubes), Advance Electric Co.; Los Angeles, CA - for models see under Advance Electric Federal Electric and Radio Co.; New York City, NY Fields, Henry; Shenandoah, IA Globe Electric Co. (Kleer-Tone); Newark, NJ 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) Gurney Seed & Nursery Co.; Yankton, SD Hickory (tube brand); (Where ?) Hylon (tubes), brand Hytron; Salem (MA) Jewel Radio Company; New York, NY JRC, Johnsonburg Radio Corporation; Johnsonburg, PA KMA, May Seed and Nursery Co.; Shenandoah, IA Knight (tubes), brand Kwik-lite (Kwiklite), Usona Manufacturing Co.; Toledo, OH Lafayette Radio & TV Corp; New York (NY) Legion (Tube brand); (Where ?) 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 Radio Tube (tube brand) Pioneer Engineering Laboratories; Jersey City, NJ Powertone (brand): Barfield Electrical Laboratories, New York NY Premier Vacuum Tube Co.; Chicago, IL QRS Music Company; Chicago, IL Quaker Radio Tubes, Gardiner & Hepburn; Philadelphia, PA Qualitron Manufacturing Co.; Newark, NJ Radio Knight, Chisholm-Barfield Corp; New York City, NY Real Tone Tube Co.; Pawtucket, RI Regal Products Corp. (Regaltone, Regal-Tone); Philadelphia, PA Rextron Radio Corporation (tube brand); Chicago Royal Blue Tube Laboratories; Newark New Jersey Royal Tube Co.; Pawtucket, RI Seaver-Williams Co.; Boston, MA Shelby Radio Tube Co.; Shelby, OH Silvertone (tubes) - see also Sears; Chicago, IL Sky Sweeper, Charles R. Ablett Co.; New York, NY Songbird (brand) Sovereign Electric & Mfg. Co.; Chicago Sparton-Cardon Tubes; Jackson MI Speed, Cable Radio Tube Corp. / Cable Supply Co.; New York and Brooklyn, NY Star Radio Tube Co.; Chicago, IL Supertron Manufacturing Co. Inc.; Hoboken, NJ The Talker (tube brand) Thorola, Winkler-Reichmann Co.; Chicago, IL Trail Blazer (tubes), Montgomery Ward; Chicago, IL Triad Television & Mfg. Co.; Pawtucket, RI Van Horne Tube Company; Franklin, OH (see also Musselman) Vogue Nonpareil (tube brand), Allan Manufacturing Co.; Arlington and Harrison, NJ Volutron (tube brand) Walco, Star Engineering Co; Arlington, NJ Western Quality Tubes; (Where?) WRC, Conway Electrical Laboratories; New York City, NY