Found in 90s Radio Electronics, this shield can control high voltage loads in the power grid. Isolation is guaranteed by the use of an optical coupler.
We found this circuit in Harris' 90s documentation. The circuit applies to modern operational...
Found in a 90s magazine for radio amateurs, this circuit can generate frequencies up to 45 MHz...
This is yet another balanced modulator circuit for SSB transmission. This two-diode circuit was...