This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and the transistor a BC548.
We found this code switch circuit in the January 1999 Electronics Now magazine. Some of the...
We found this circuit for musical instruments in the March 1992 Radio Electronics magazine. The...
This circuit was found in documentation from 1977. Its purpose is to diode-switch the frequency of a VFO....