Found in Popular Electronics from the 90s, this circuit uses still common components. Its power is 20 W, requiring care when winding the transformers.
This circuit can be used as a clok in digital applications. Power supply is 5-V and the pins for...
This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has...
This circuit has no lock, but it has a very low consumption feature in the standby condition. We...