This circuit was suggested by Linear Technology in documentation from the 90s. The circuit applies to modern operators with modern transistors.
We find this circuit in a Popular Electronics of the 80's. The frequency range depends on C1 and...
This oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....
We found this circuit in a Popular Electronics from the 90's. The circuit activates an oscillator...