1959 British One Valve Radiogram

1959JuneRadioConstrSixty years ago this month, the June 1959 issue of British magazine Radio Constructor showed how to put together this one valve radiogram.  For readers on this side of the pond, that means a one-tube radio-phono combination.  A single ECL80 dual tube served as audio amplifier for both the radio and phonograph.  A simple crystal set using a germanium diode pulled in the local stations on either long wave or medium wave.

In addition to showing how to put together the simple circuit, the magazine promised that the cabinet work would be lucidly explained so that no difficulty would be experienced, even by a beginner.  A power transformer assured safe operation, and a single DP3T switch was used to select longwave, mediumwave, or gramophone.

1959JuneRadioConstrSchematic