Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
This circuit generates a precise 100 kHz signal. The signal is given by a crystal and can be used...
This circuit was found in a Popular Electronics from the 90s. The circuit uses a general purpose...
This proximity relay circuit was found in the July 1990 Radio Electronics magazine. The supply...