No. 3925 (Model 1)

Image credited to J. Thomas

Image Courtesy of John Jenkins | Visit the SparkMuseum!

Image Courtesy of Grant Kornberg, Technogallerie

The Atwater Kent No. 3925 (Model 1) Receiving Set holds the distinction of being the company's first factory-built tube radio, introduced in November 1922 with a debut price of $32.00. This two-tube "breadboard" model was simpler than its successor, featuring a tuner, detector, and a single stage of audio amplification. Its designed tube line-up often specified a Type 00 tube for the detector and a Type 01 tube for the amplifier, though collectors note the flexibility to use other contemporary tubes. Like the later Model 2, the Model 1's design was a direct response to avoiding the costly patent license for regenerative circuits held by RCA. Atwater Kent strategically sold the set without the central variometer installed. Board dimensions are 18-1/2" x 8-1/2".

No. 3925 Model 1 part of | Phil's Collection

Image Courtesy of Grant Kornberg, Technogallerie

Image Courtesy of Grant Kornberg, Technogallerie

Image Courtesy of Grant Kornberg, Technogallerie

Image credited to J. Thomas

Image credited to J. Thomas