Found in a QST magazine from the 90s, this powerful unit is intended to supply a VHF transceiver for the 144 MHz band with 1.2 kW of power.
This circuit can be used in demonstrations or science fairs. The circuit uses headphones and can...
We found this wiretapping circuit in a publication from the 90s. The circuit allows the cable...
This circuit uses a resonant reed switch at the trigger frequency. The circuit is from General...