Radio man
Radio man is the name of an experimental box of the publishing universe for young people. The concept comes largely from Wilhelm Fröhlich . This experiment kit was offered from 1934 to around 1960 with only minor modifications. With the box, many experiments in electrical, radio and radio technology could be set up. The possible experiments included a detector receiver , a spark transmitter , a feedback single-circuit receiver with an electron tube and a music transmitter . A major revision took place around 1960: the wooden base plates were replaced by plastic ones, an EF98 tube replaced the DM 300 pin-base tube , and a transistor was used for the first time with an OC 612 in a blackened glass housing (later an AC 122 in a sheet metal housing) . The attempts to send, however, were removed.
The product was discontinued around 1972. The successful concept of the “radio man” was continued by Kosmos with the series “Radio + Electronics 1” (imprinted on the box cover: “The new radio man”) with the supplementary sets “Radio + Electronics 11” and “Radio + Electronics 12”. As early as 1958, Heinz Richter developed his more demanding Kosmos teaching set “Radio + Electronics 7A” with three supplementary sets for Kosmos, parallel to Fröhlich's radio man. Kosmos replaced this series in 1966 with Richter's “Electronics Laboratory XG”, again with additional boxes. In 2004 Kosmos Verlag brought out a radio man anniversary edition (70 years) with the ECC82 radio tube . However, this is a prefabricated audio receiver in a nostalgic design with instructions for experimental modifications.