This interesting circuit was found in a 90’s American documentation. The circuit has a maximum current of 20 A and uses a transformer with the characteristics given next to the diagram.
This circuit turns on a lamp after the time set on the potentiometer. The circuit is from a Radio...
This signal amplifier for ATV in the 427 to 439 MHz band was found in a magazine 73 for radio...
This amplifier has a few Watt output, using old transistors. The speaker is 45 ohms, but with...