Found in Philips documentation from the 1970s, this circuit uses components from the era. The stability is 0.045% per centigrade degree.
The configuration presented below was obtained in the Linear Application Handbook of the National...
This small circuit for the medium or short-wave range, depending on the coil, was found in a...
In fact, the 556 consists of a double 555, which can be replaced by these integrated ones. The...