199

Common type USA tube/semicond. Apex, Radio Tube Corporation; Newark, NJ Atlantic Electric Lamp Company; Danvers, MA Atlas, Universal Radio Tube Mfg Co.; Brooklyn, NY Belltone = Tube brand Commander Radio Tubes; (where?) Dynotron Manufacturing Co; New York City, NY Electrical Research Laboratories Inc. (Erla); Chicago, Illinois Elektron (tubes), Lectrodio Corp.; Lynn, MA Exceltron (tubes), Excell Laboratories; New York, NY Ken-Rad, The Kentucky Radio Corporation; Owensboro, KY Perfection Tube Co.; Chicago, IL Rolls Royce Tube Co.; Newark, NJ Songbird (brand) Speed, Cable Radio Tube Corp. / Cable Supply Co.; New York and Brooklyn, NY Tectron Radio Corp.; New York (NY) Van Horne Tube Company; Franklin, OH (see also Musselman) Volutron (tube brand)