This circuit was obtained from a 1968 documentation and can be adapted to use current equivalent components. The maximum frequency depends on the components used.
The CMOS 4046 integrated circuit is seldom used, both due to the difficulty of finding it and the...
This circuit was obtained in a documentation for radio amateurs in 1974. The coil consists of 12...
E) The interesting thing about this circuit found in a 1985 English magazine is that it controls the...