We found this circuit with SCRs and unijunction in a Radio Electronics magazine from June 1969. The SCRs must be in accordance with the controlled incandescent lamp. The circuit is powered by DC.
We found this 4-transistor receiver for the AM MW range in a 1960 transistor manual from Sylvania....
This 16-bit circuit was found in a 2005 Linear Technology application manual. The circuit uses...
The circuit is from an English publication from 1970, but it can be assembled with more modern...