In the 1920's the popular technical magazines (and, for a time, even the mass-market magazines) were full of ads for tools, guides, parts, and components that radio constructors and experimenters needed to make the newest and best radio receivers.

If you like old radio, you will like the e-book reprint of the 1922 Sears, Roebuck Electrical Goods and Radio Apparatus Catalog that Hidden Knowledge has published. Here's a writeup about it, with pictures. It's $2.99, free of DRM, and with all the pages rendered as images you can enlarge to see detail, and even print out. It's $2.99! Follow the link.
  • Adler-Royal Speakers -1925A 2351 visits Adler-Royal Speakers -1925A
  • Airphone Products -1923A 2280 visits Airphone Products -1923A
  • Allen-Bradley Condensers -1925A 1595 visits Allen-Bradley Condensers -1925A
  • Allen-Bradley Controls -1925A 1232 visits Allen-Bradley Controls -1925A
  • Anderson Light Static Machine -1913A 1181 visits Anderson Light Static Machine -1913A
  • Atlas Speakers -1925A 1422 visits Atlas Speakers -1925A
  • Atwater Kent Amplifiers -1922A 1660 visits Atwater Kent Amplifiers -1922A
  • Atwater Kent Loud Speakers -1925A 1490 visits Atwater Kent Loud Speakers -1925A
  • Baldwin-Pacific Radio Kits -1925A 1155 visits Baldwin-Pacific Radio Kits -1925A
  • Barkelew Antenna Switches -1925A 1668 visits Barkelew Antenna Switches -1925A
  • Belden Aerial Wire -1925A 1283 visits Belden Aerial Wire -1925A
  • Brandes Headsets -1925A 1464 visits Brandes Headsets -1925A
  • Bremer-Tully Radio Kits -1925A 2300 visits Bremer-Tully Radio Kits -1925A
  • Briggs & Stratton Headphones -1922A 1614 visits Briggs & Stratton Headphones -1922A
  • Bristol Speakers -1925A 1147 visits Bristol Speakers -1925A
  • Burgess Radio Batteries -1923 1506 visits Burgess Radio Batteries -1923
  • Carborundum Crystal Detectors -1925A 1396 visits Carborundum Crystal Detectors -1925A
  • Cardwell Condensers -1925A 1247 visits Cardwell Condensers -1925A
  • Consrad Radio Design Guides -1925A 1308 visits Consrad Radio Design Guides -1925A
  • Daven Amplifiers -1924A 1314 visits Daven Amplifiers -1924A
  • Dictogrand Loud Speakers -1924A 183 visits Dictogrand Loud Speakers -1924A
  • Dictograph Loudspeakers -1922A 1811 visits Dictograph Loudspeakers -1922A
  • Eastern Low Loss Couplers -1925A 1004 visits Eastern Low Loss Couplers -1925A
  • Effarsee Portable Antennae -1925A 977 visits Effarsee Portable Antennae -1925A
  • Electro Importing Company -1913A 1542 visits Electro Importing Company -1913A
  • Elgin Radio Kits -1925A 987 visits Elgin Radio Kits -1925A
  • Erla Radio Kits -1925A 2347 visits Erla Radio Kits -1925A
  • Exide Batteries -1925A 1756 visits Exide Batteries -1925A
  • Experimenters Information Service -1925A 1366 visits Experimenters Information Service -1925A
  • Fada Detectors -1922A 1109 visits Fada Detectors -1922A
  • Federal Radio Products -1922A 1102 visits Federal Radio Products -1922A
  • Freshman Radio Kit -1924A 1992 visits Freshman Radio Kit -1924A
  • Frost Fones -1922A 1591 visits Frost Fones -1922A
  • Frost Fones -1922B 1202 visits Frost Fones -1922B
  • Geraco Radio Accessories -1922A 1142 visits Geraco Radio Accessories -1922A
  • Haller-Cunningham Rotary Spark Gap -1913A 1200 visits Haller-Cunningham Rotary Spark Gap -1913A
  • Hammarlund Condensers -1925A 945 visits Hammarlund Condensers -1925A
  • Heath Company -1949A 1256 visits Heath Company -1949A
  • Heath Company -1949B 1315 visits Heath Company -1949B
  • Heath Condensers -1925A 1186 visits Heath Condensers -1925A
  • Holtzer-Cabot Headphones -1913A 1548 visits Holtzer-Cabot Headphones -1913A
  • Jewett Radio Tuners -1922A 1514 visits Jewett Radio Tuners -1922A
  • L. E. B. Pocket Tool Kit -1913A 2113 visits L. E. B. Pocket Tool Kit -1913A
  • Leiman Bros. Vacuum Pumps -1913A 3002 visits Leiman Bros. Vacuum Pumps -1913A
  • Magnavox Loudspeakers -1923A 821 visits Magnavox Loudspeakers -1923A
  • Manhattan Headsets -1922A 1123 visits Manhattan Headsets -1922A
  • Manhattan Junior Speakers -1925A 1201 visits Manhattan Junior Speakers -1925A
  • Meteor Oscillation Transformers -1917A 819 visits Meteor Oscillation Transformers -1917A
  • Moon Loudspeakers -1922A 1203 visits Moon Loudspeakers -1922A
  • Mozart-Grand Speakers -1925A 1247 visits Mozart-Grand Speakers -1925A
  • Murdock Headphones -1922A 1373 visits Murdock Headphones -1922A
  • New York Coil Company -1922A 1841 visits New York Coil Company -1922A
  • Phenix Radio Ultradyne Kit -1924A 2265 visits Phenix Radio Ultradyne Kit -1924A
  • Proudfoot Condensers -1925A 1129 visits Proudfoot Condensers -1925A
  • Radio Corporation of America -1922A 1485 visits Radio Corporation of America -1922A
  • Radio Shack Ambassador Kit -1925A 1322 visits Radio Shack Ambassador Kit -1925A
  • Reflectone Loud Speaker and Cigarette Box -1925A 1234 visits Reflectone Loud Speaker and Cigarette Box -1925A
  • Sears Ideal Half-KW Transmitting Set -1917A 1314 visits Sears Ideal Half-KW Transmitting Set -1917A
  • Sears University 1 KW Transmitting Set -1917A 961 visits Sears University 1 KW Transmitting Set -1917A
  • Signal Condensers -1925A 774 visits Signal Condensers -1925A
  • Signal Radio Components -1922A 1022 visits Signal Radio Components -1922A
  • Sleeper Radio -1922A 2036 visits Sleeper Radio -1922A
  • Sleeper Radio Construction Sets -1922A 1251 visits Sleeper Radio Construction Sets -1922A
  • Stromberg-Carlson Loud Speakers -1925A 1256 visits Stromberg-Carlson Loud Speakers -1925A
  • Superadio Low Loss Radio Kit -1925A 1201 visits Superadio Low Loss Radio Kit -1925A
  • Tower Headphones -1925A 1036 visits Tower Headphones -1925A
  • Trimm Speakers -1925A 1351 visits Trimm Speakers -1925A
  • Wallace Valve Detectors -1913A 1561 visits Wallace Valve Detectors -1913A
  • Wireless Specialty Apparatus Co. -1920A 1998 visits Wireless Specialty Apparatus Co. -1920A
  • Wood Cabinet Corporation -1929A 1718 visits Wood Cabinet Corporation -1929A
  • Wood Cabinet Corporation -1929B 2226 visits Wood Cabinet Corporation -1929B