Phase and amplitude can be controlled in this circuit found in the May 1988 Radio Electronics magazine. The circuit requires a symmetrical power supply.
This circuit was obtained in a 1976 magazine. We can use the 555 and another BC548 to generate square...
This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals...
The coils of this simple mid-wave radius are wound 28 or 26 on a 12 to 30 cm long ferrite rod and the...