The Radiodyne was introduced in the fall of 1923, employed two stages of RF amplification and was the first successful AK radio employing condenser tuning (The Model 8, introduced at the same time as the Model 5 also used a single tuning condenser, but it did not sell well). The Radiodyne was built in order to capitalize on the popularity of the new 3-dial, 5-tube TRF Neutrodyne radios such as the FADA 160 and Freed Eisemann NR-5. Unfortunately the “Radiodyne” trademark was already held by Western Coil, so Atwater Kent was forced to discontinue the unit. The Radiodyne is distinguished by its green tuning condenser cans. The radiodyne is one of the most sought after models. This example is very clean and still retains the original paper label on the bottom and a unique set of metal tubs caps…. $1400