This circuit is from a 1965 General Electric hobby manual. The circuit can be assembled with sensitive reed relays.
This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time...
This circuit turns on and off from pulses applied to the CLK input. The output 0 goes to the “’1"...
This circuit uses a lower frequency crystal in an excitation system for an oscillator with a coil...