The signals from this circuit obtained from the 1965 Radio Shack documentation are picked up from a medium wave receiver. L1 and L2 have 80 to 100 turns of yarn 28 on a ferrite rod.
This circuit divides the grid 60 Hz frequency to obtain 20 Hz to drive mechanical watches used at...
This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The...
This circuit was obtained in a 1964 Electronic Design. Equivalent modern transistors can be used....