No. 4550/4560 (Model 10A)

The Atwater Kent No. 4550 (& 4560) Model 10A Receiving Set was introduced in January 1924 as the primary successor to the short-lived Model 10 (Radiodyne) and highly successful Model 10. Maintaining the groundbreaking five-tube, three-dial Tuned Radio Frequency (TRF) circuit, the Model 10A continued to utilize two RF amplification stages, one detector, and two AF amplification stages, typically powered by five Type 01A tubes. The $88.00 price point (excluding tubes) remained consistent for this class of receiver. The Model 10A distinguished itself through several design refinements that streamlined the set: it replaced the numerous binding posts on the back panel of the Radiodyne with a single, dedicated integral wiring harness (battery cable). The production of the Model 10A, offered in both brown (4550) and black (4560) finishes. Board dimensions 31.5" x 10".

Image Courtesy of Grant Kornberg, Technogallerie

Image Courtesy of Grant Kornberg, Technogallerie

Image Courtesy of Grant Kornberg, Technogallerie

Image Courtesy of John Jenkins | Visit the SparkMuseum!