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 2378 visits Adler-Royal Speakers -1925A
  • Airphone Products -1923A 2300 visits Airphone Products -1923A
  • Allen-Bradley Condensers -1925A 1612 visits Allen-Bradley Condensers -1925A
  • Allen-Bradley Controls -1925A 1255 visits Allen-Bradley Controls -1925A
  • Anderson Light Static Machine -1913A 1200 visits Anderson Light Static Machine -1913A
  • Atlas Speakers -1925A 1443 visits Atlas Speakers -1925A
  • Atwater Kent Amplifiers -1922A 1680 visits Atwater Kent Amplifiers -1922A
  • Atwater Kent Loud Speakers -1925A 1516 visits Atwater Kent Loud Speakers -1925A
  • Baldwin-Pacific Radio Kits -1925A 1178 visits Baldwin-Pacific Radio Kits -1925A
  • Barkelew Antenna Switches -1925A 1685 visits Barkelew Antenna Switches -1925A
  • Belden Aerial Wire -1925A 1304 visits Belden Aerial Wire -1925A
  • Brandes Headsets -1925A 1485 visits Brandes Headsets -1925A
  • Bremer-Tully Radio Kits -1925A 2318 visits Bremer-Tully Radio Kits -1925A
  • Briggs & Stratton Headphones -1922A 1633 visits Briggs & Stratton Headphones -1922A
  • Bristol Speakers -1925A 1166 visits Bristol Speakers -1925A
  • Burgess Radio Batteries -1923 1533 visits Burgess Radio Batteries -1923
  • Carborundum Crystal Detectors -1925A 1413 visits Carborundum Crystal Detectors -1925A
  • Cardwell Condensers -1925A 1267 visits Cardwell Condensers -1925A
  • Consrad Radio Design Guides -1925A 1325 visits Consrad Radio Design Guides -1925A
  • Daven Amplifiers -1924A 1331 visits Daven Amplifiers -1924A
  • Dictogrand Loud Speakers -1924A 203 visits Dictogrand Loud Speakers -1924A
  • Dictograph Loudspeakers -1922A 1830 visits Dictograph Loudspeakers -1922A
  • Eastern Low Loss Couplers -1925A 1029 visits Eastern Low Loss Couplers -1925A
  • Effarsee Portable Antennae -1925A 998 visits Effarsee Portable Antennae -1925A
  • Electro Importing Company -1913A 1564 visits Electro Importing Company -1913A
  • Elgin Radio Kits -1925A 1008 visits Elgin Radio Kits -1925A
  • Erla Radio Kits -1925A 2369 visits Erla Radio Kits -1925A
  • Exide Batteries -1925A 1777 visits Exide Batteries -1925A
  • Experimenters Information Service -1925A 1386 visits Experimenters Information Service -1925A
  • Fada Detectors -1922A 1135 visits Fada Detectors -1922A
  • Federal Radio Products -1922A 1122 visits Federal Radio Products -1922A
  • Freshman Radio Kit -1924A 2015 visits Freshman Radio Kit -1924A
  • Frost Fones -1922A 1611 visits Frost Fones -1922A
  • Frost Fones -1922B 1220 visits Frost Fones -1922B
  • Geraco Radio Accessories -1922A 1166 visits Geraco Radio Accessories -1922A
  • Haller-Cunningham Rotary Spark Gap -1913A 1222 visits Haller-Cunningham Rotary Spark Gap -1913A
  • Hammarlund Condensers -1925A 961 visits Hammarlund Condensers -1925A
  • Heath Company -1949A 1280 visits Heath Company -1949A
  • Heath Company -1949B 1341 visits Heath Company -1949B
  • Heath Condensers -1925A 1202 visits Heath Condensers -1925A
  • Holtzer-Cabot Headphones -1913A 1567 visits Holtzer-Cabot Headphones -1913A
  • Jewett Radio Tuners -1922A 1535 visits Jewett Radio Tuners -1922A
  • L. E. B. Pocket Tool Kit -1913A 2131 visits L. E. B. Pocket Tool Kit -1913A
  • Leiman Bros. Vacuum Pumps -1913A 3022 visits Leiman Bros. Vacuum Pumps -1913A
  • Magnavox Loudspeakers -1923A 849 visits Magnavox Loudspeakers -1923A
  • Manhattan Headsets -1922A 1144 visits Manhattan Headsets -1922A
  • Manhattan Junior Speakers -1925A 1224 visits Manhattan Junior Speakers -1925A
  • Meteor Oscillation Transformers -1917A 837 visits Meteor Oscillation Transformers -1917A
  • Moon Loudspeakers -1922A 1224 visits Moon Loudspeakers -1922A
  • Mozart-Grand Speakers -1925A 1270 visits Mozart-Grand Speakers -1925A
  • Murdock Headphones -1922A 1398 visits Murdock Headphones -1922A
  • New York Coil Company -1922A 1860 visits New York Coil Company -1922A
  • Phenix Radio Ultradyne Kit -1924A 2284 visits Phenix Radio Ultradyne Kit -1924A
  • Proudfoot Condensers -1925A 1147 visits Proudfoot Condensers -1925A
  • Radio Corporation of America -1922A 1508 visits Radio Corporation of America -1922A
  • Radio Shack Ambassador Kit -1925A 1338 visits Radio Shack Ambassador Kit -1925A
  • Reflectone Loud Speaker and Cigarette Box -1925A 1255 visits Reflectone Loud Speaker and Cigarette Box -1925A
  • Sears Ideal Half-KW Transmitting Set -1917A 1333 visits Sears Ideal Half-KW Transmitting Set -1917A
  • Sears University 1 KW Transmitting Set -1917A 980 visits Sears University 1 KW Transmitting Set -1917A
  • Signal Condensers -1925A 790 visits Signal Condensers -1925A
  • Signal Radio Components -1922A 1054 visits Signal Radio Components -1922A
  • Sleeper Radio -1922A 2054 visits Sleeper Radio -1922A
  • Sleeper Radio Construction Sets -1922A 1272 visits Sleeper Radio Construction Sets -1922A
  • Stromberg-Carlson Loud Speakers -1925A 1278 visits Stromberg-Carlson Loud Speakers -1925A
  • Superadio Low Loss Radio Kit -1925A 1218 visits Superadio Low Loss Radio Kit -1925A
  • Tower Headphones -1925A 1059 visits Tower Headphones -1925A
  • Trimm Speakers -1925A 1370 visits Trimm Speakers -1925A
  • Wallace Valve Detectors -1913A 1579 visits Wallace Valve Detectors -1913A
  • Wireless Specialty Apparatus Co. -1920A 2022 visits Wireless Specialty Apparatus Co. -1920A
  • Wood Cabinet Corporation -1929A 1738 visits Wood Cabinet Corporation -1929A
  • Wood Cabinet Corporation -1929B 2245 visits Wood Cabinet Corporation -1929B