This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
This circuit is used to connect an additional capacitor to a tuned circuit of a VFO. The circuit...
An way to change the frequency of the previous oscillator (CIR112E) is to add a variable capacitor in the...
This circuit using a SIDAC as a relaxation oscillator was found in the ON Semiconductor manual for...