The figure shows a remote-control receiver working the 27 MHz band, very popular in the 60’s. The circuit us from a February 1961 Radio Electronics magazine.
This circuit was found in a 1968 EEE and can be implemented with any current general-purpose transistor....
Two 3-terminal regulators like the LM317 can be used to "clip" a sinusoidal signal, in order to...
This circuit was found in a Radio Electronics from January 1965. The relay is 9V, but we can...