This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their frequency. We found it in the November 1998 Electronics Now magazine.
We found this circuit in a technical documentation from the 70s. It can be implemented with more...
This simple MW radio circuit with two transistors was obtained in an Argentine publication from...
The LM12 integrated circuit can provide a maximum current of 4 A with a symmetrical supply of 40...