This circuit is for analog TV video signals and was found in the March 1988 issue of Radio Electronics magazine. The circuit uses a Maxim integrated circuit that can still be found.
This indicator makes use of an LM339 voltage comparator circuit that contains 4 internal...
This two-transistor amplifier can be used as power stage for intercom, experimental receivers,...
This circuit is from an old American publication, using transistors of the time and operating with a 48...