No. 4340 (Radiodyne & Model 10) & 4600
The Atwater Kent No. 4340 Model 10 Receiving Set, initially marketed as the Radiodyne, was a monumental technical breakthrough for the company, introduced on September 7th, 1923 with an original retail price of approximately $88.00 (excluding tubes). This five-tube breadboard was hailed as the "Wonder Set" for its dramatically improved performance, utilizing a Tuned Radio Frequency (TRF) circuit with three independently tuned stages. Its tube line-up typically consisted of five Type 01A tubes (or four 01A and one 00A detector).
The Model 10 represented Atwater Kent’s first successful shift from inductive (coil-based) tuning to capacitive tuning, featuring three large, variable condensers (the three dials). The initial "Radiodyne" name, which is stamped on the coil tops of the earliest production run, was dropped quickly, after only 8 or 9 weeks, due to a trademark conflict and a threatened lawsuit from the Western Coil Company, which already owned the rights to the name. The rarity of the Model 4340 with the "Radiodyne" labels makes it one of the most historically desirable and valuable sets for collectors.
Later Model 10 sets used gray (green), brown or black components, the final part No. 4600, used brown components exclusively. Board dimensions 31.5" x 10".
Model 10 - Type 4340 Radiodyne | Phil's Collection
Type 4340 Radiodyne Coil
Radiodyne Image Courtesy of Grant Kornberg, Technogallerie
Radiodyne Image Courtesy of Grant Kornberg, Technogallerie
Radiodyne Image Courtesy of Grant Kornberg, Technogallerie
Radiodyne Image Courtesy of Grant Kornberg, Technogallerie
Radiodyne from the collection of the CHRS | California Historic Radio Society
No. 4340 Model 10 Image Courtesy of Grant Kornberg, Technogallerie
No. 4340 Model 10 Image Courtesy of Grant Kornberg, Technogallerie
No. 4340 Model 10 Image Courtesy of Grant Kornberg, Technogallerie
No. 4340 Model 10 Image Courtesy of Grant Kornberg, Technogallerie
Model 10 No. 4600 - From the Maurice Greeson collection
Model 10 No. 4600 - From the Maurice Greeson collection
Model 10 No. 4600 - From the Maurice Greeson collection
Model 10 No. 4600 - From the Maurice Greeson collection