We found this circuit in an old American documentation, but the circuit can still be assembled with ease as the used components are still available. MOSFETs admit equivalents.
In the figure we have a typical polarization circuit for MOSFETs with a high impedance...
This equalizer was found in the May 1978 issue of Radio Electronics magazine. The component values...
Found in a 1980s American documentation, this crystal-controlled oscillator generates 100 MHz...