This dual-gate FET RF signal mixer circuit was found in a 1980s documentation. The circuit is intended for applications in superheterodyne receivers of the time.
Antenova Grandis antennas can be purchased from Mouser Electronics for frequencies from 868 MHz to...
This simple electroscope with bipolar transistors is not the most sensitive, but can detect static...
The circuit shown by figure 1 consists in a Schmitt-Trigger using two common general purpose NPN...