Using a 4046 PLL, which is uncommon today, this circuit was found in the October 1994 issue of Electronics Now magazine. The circuit can be modified by changing the capacitor.
This circuit was suggested by Motorola in a 1980s publication. It is based on a PUT that is not a...
Found in American documentation from the 70s, this circuit uses components of the time, uncommon...
This is an old circuit, but totally viable and with excellent sound quality. BD transistors must...