We found this receiver on a single chip in the 1976 Siemens integrated circuits manual. The circuit is of the super heterodyne type using ceramic filter in the IF.
In the 110 V network, capacitors of 200 V or more and in the 220 V network, capacitors of 400 V or...
This circuit makes use of older operational amplifiers, but can be designed on the basis of modern...
This 12 V incandescent lamp switch with time delay can be found in old documentation. The SCR can...