This circuit for the 3 to 6 MHz band was found in a 90s Popular Electronics. The components of the network formed by C6 depend on the frequency range to be covered.
The circuit shown has the advantage over the reductions with resistors to have a much higher...
This circuit uses a switch to select the direction of rotation of a DC motor. It was found in the...
Found in American documentation, this circuit can make use of modern equivalent transistors. The...