)
This variable frequency oscillator was found in an old American documentation. Transistors allow more modern equivalents and coil data are found next to the diagram for several frequency bands.
This circuit, from an old Argentine publication, makes it possible to use a 1 mA full-scale...
The transistors are 2N918, 2N3464 and other RF equivalents of the time for Q1. For Q2, 2N3399, 2N2894...
The presented circuit can use an equivalent transistor like the BC548. The configuration, which [is...