General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs that are not common components today. Note the timing components that may change.
This is one of many possible configurations for this type of oscillator that generates sinusoidal...
This circuit of a few tens of milliwatts of power requires a single source. We found it in a Radio...
If you have an old cassette player or bought one from a junk shop, you can set up a small table...