This is the power step of the previous circuit. Output transistors must be mounted on good heat sinks. The circuit is from documentation from the 60s.
Hartley oscillator operates in the audio range. Frequency can be adjusted by P1 and also depends...
The noise comes from the PN junction of a common silicon diode. Since no gain is given by the...
This is stage is transformer coupled and was found in na old publication of the year 1958. The...