This is the February 1930 issue of Radio News. It includes articles on AA5 tube radios, amplifiers, the use of radio by Antarctic explorers, transformers, early police radio, receiver circuits, patent law and loudspeaker manufacture. These early-era radio articles are about completely outdated, archaic technology but remain interesting from a historical perspective. It's 97 pages chock full of radio arcana.
All content herein should be considered to have a Creative-commons-like license with the sole exclusion of Wikipedia. I welcome use of my research by all writers, readers and researchers except those that would publish such information on Wikipedia. Thank you.