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 2318 visits Adler-Royal Speakers -1925A
  • Airphone Products -1923A 2264 visits Airphone Products -1923A
  • Allen-Bradley Condensers -1925A 1583 visits Allen-Bradley Condensers -1925A
  • Allen-Bradley Controls -1925A 1194 visits Allen-Bradley Controls -1925A
  • Anderson Light Static Machine -1913A 1168 visits Anderson Light Static Machine -1913A
  • Atlas Speakers -1925A 1405 visits Atlas Speakers -1925A
  • Atwater Kent Amplifiers -1922A 1638 visits Atwater Kent Amplifiers -1922A
  • Atwater Kent Loud Speakers -1925A 1468 visits Atwater Kent Loud Speakers -1925A
  • Baldwin-Pacific Radio Kits -1925A 1139 visits Baldwin-Pacific Radio Kits -1925A
  • Barkelew Antenna Switches -1925A 1655 visits Barkelew Antenna Switches -1925A
  • Belden Aerial Wire -1925A 1266 visits Belden Aerial Wire -1925A
  • Brandes Headsets -1925A 1447 visits Brandes Headsets -1925A
  • Bremer-Tully Radio Kits -1925A 2277 visits Bremer-Tully Radio Kits -1925A
  • Briggs & Stratton Headphones -1922A 1596 visits Briggs & Stratton Headphones -1922A
  • Bristol Speakers -1925A 1134 visits Bristol Speakers -1925A
  • Burgess Radio Batteries -1923 1483 visits Burgess Radio Batteries -1923
  • Carborundum Crystal Detectors -1925A 1382 visits Carborundum Crystal Detectors -1925A
  • Cardwell Condensers -1925A 1225 visits Cardwell Condensers -1925A
  • Consrad Radio Design Guides -1925A 1290 visits Consrad Radio Design Guides -1925A
  • Daven Amplifiers -1924A 1301 visits Daven Amplifiers -1924A
  • Dictogrand Loud Speakers -1924A 147 visits Dictogrand Loud Speakers -1924A
  • Dictograph Loudspeakers -1922A 1792 visits Dictograph Loudspeakers -1922A
  • Eastern Low Loss Couplers -1925A 991 visits Eastern Low Loss Couplers -1925A
  • Effarsee Portable Antennae -1925A 953 visits Effarsee Portable Antennae -1925A
  • Electro Importing Company -1913A 1510 visits Electro Importing Company -1913A
  • Elgin Radio Kits -1925A 972 visits Elgin Radio Kits -1925A
  • Erla Radio Kits -1925A 2332 visits Erla Radio Kits -1925A
  • Exide Batteries -1925A 1730 visits Exide Batteries -1925A
  • Experimenters Information Service -1925A 1355 visits Experimenters Information Service -1925A
  • Fada Detectors -1922A 1089 visits Fada Detectors -1922A
  • Federal Radio Products -1922A 1088 visits Federal Radio Products -1922A
  • Freshman Radio Kit -1924A 1967 visits Freshman Radio Kit -1924A
  • Frost Fones -1922A 1572 visits Frost Fones -1922A
  • Frost Fones -1922B 1186 visits Frost Fones -1922B
  • Geraco Radio Accessories -1922A 1125 visits Geraco Radio Accessories -1922A
  • Haller-Cunningham Rotary Spark Gap -1913A 1187 visits Haller-Cunningham Rotary Spark Gap -1913A
  • Hammarlund Condensers -1925A 932 visits Hammarlund Condensers -1925A
  • Heath Company -1949A 1238 visits Heath Company -1949A
  • Heath Company -1949B 1298 visits Heath Company -1949B
  • Heath Condensers -1925A 1176 visits Heath Condensers -1925A
  • Holtzer-Cabot Headphones -1913A 1533 visits Holtzer-Cabot Headphones -1913A
  • Jewett Radio Tuners -1922A 1493 visits Jewett Radio Tuners -1922A
  • L. E. B. Pocket Tool Kit -1913A 2093 visits L. E. B. Pocket Tool Kit -1913A
  • Leiman Bros. Vacuum Pumps -1913A 2978 visits Leiman Bros. Vacuum Pumps -1913A
  • Magnavox Loudspeakers -1923A 804 visits Magnavox Loudspeakers -1923A
  • Manhattan Headsets -1922A 1105 visits Manhattan Headsets -1922A
  • Manhattan Junior Speakers -1925A 1185 visits Manhattan Junior Speakers -1925A
  • Meteor Oscillation Transformers -1917A 801 visits Meteor Oscillation Transformers -1917A
  • Moon Loudspeakers -1922A 1178 visits Moon Loudspeakers -1922A
  • Mozart-Grand Speakers -1925A 1228 visits Mozart-Grand Speakers -1925A
  • Murdock Headphones -1922A 1345 visits Murdock Headphones -1922A
  • New York Coil Company -1922A 1826 visits New York Coil Company -1922A
  • Phenix Radio Ultradyne Kit -1924A 2252 visits Phenix Radio Ultradyne Kit -1924A
  • Proudfoot Condensers -1925A 1114 visits Proudfoot Condensers -1925A
  • Radio Corporation of America -1922A 1472 visits Radio Corporation of America -1922A
  • Radio Shack Ambassador Kit -1925A 1306 visits Radio Shack Ambassador Kit -1925A
  • Reflectone Loud Speaker and Cigarette Box -1925A 1214 visits Reflectone Loud Speaker and Cigarette Box -1925A
  • Sears Ideal Half-KW Transmitting Set -1917A 1297 visits Sears Ideal Half-KW Transmitting Set -1917A
  • Sears University 1 KW Transmitting Set -1917A 945 visits Sears University 1 KW Transmitting Set -1917A
  • Signal Condensers -1925A 764 visits Signal Condensers -1925A
  • Signal Radio Components -1922A 1001 visits Signal Radio Components -1922A
  • Sleeper Radio -1922A 2018 visits Sleeper Radio -1922A
  • Sleeper Radio Construction Sets -1922A 1222 visits Sleeper Radio Construction Sets -1922A
  • Stromberg-Carlson Loud Speakers -1925A 1233 visits Stromberg-Carlson Loud Speakers -1925A
  • Superadio Low Loss Radio Kit -1925A 1189 visits Superadio Low Loss Radio Kit -1925A
  • Tower Headphones -1925A 1013 visits Tower Headphones -1925A
  • Trimm Speakers -1925A 1337 visits Trimm Speakers -1925A
  • Wallace Valve Detectors -1913A 1546 visits Wallace Valve Detectors -1913A
  • Wireless Specialty Apparatus Co. -1920A 1981 visits Wireless Specialty Apparatus Co. -1920A
  • Wood Cabinet Corporation -1929A 1696 visits Wood Cabinet Corporation -1929A
  • Wood Cabinet Corporation -1929B 2205 visits Wood Cabinet Corporation -1929B