[MrFixr55]

Hi Peter,

That set interested me, especially when you stated that it used regeneration, so I went to Radiomuseum to pull the schematic. I immediately thought of the Philco 80, 84 and 37-84 which used the same technique. I thought that was a Philco exclusive in multitube radios (Granted, most of the single tube or 2 tube radios, at last the Westinghouse and GE sets sold by RCA used the Armstrong superregenerative circuit that RCA owned the patent for), until someone mentioned the Atwater Kent 944. The major difference is that the Philcos and A-K were Superhets where the K-B you mentioned is a TRF. There were many TRF sets that were 3 tube plus rectifier in the early 1930s using a pentode RF, a pentode biased detector and a pentode audio output. Rectifiers were either 1-A, a 37 triode used as a diode or the 25Z5. These sets were popular because they were cheap and cheap was needed in 1933.