This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are current and the transistor is of general use.
Found in an English documentation from 1977, this flasher or pulser circuit drives an LED. The...
This passive volume compressor was found in documentation from the 1980s. It needs a good...
This circuit was found in an old American documentation aimed at amateurs. The circuit generates...