Found in documentation from the 1980s, this circuit can generate signals between 6 and 8 MHz. The frequency can be slightly varied in the setting. FET is a general-purpose type.
We found this circuit in a Hands-On Electroncs from the 90s. The circuit uses an LED indicator. Diodes...
This circuit was obtained in a 1973 national publication, translated from an English publication of the...
We found this circuit in a 1983 English magazine, but it can be easily assembled with the BC548...