Early Electronic Television
RCA 1939 Homemade Chassis
This is a pre-war kit chassis that was built by an RCA tube engineer in 1939. It tunes two channels, using some of the same parts as the RCA TRK series. The IF Transformers were made by the Sickles company. The engineering data sheets for these transformers includes a schematic diagram of the receiver. Here is an article about this receiver.