Found in a QST magazine from the 90s, this circuit broadcasts on different amateur radio bands depending on the coil. Data for the coil and crystal are provided next to the diagram.
This circuit is from a 1975 Sperimentare (number 11). The circuit uses optical coupling for a...
Based on components from Linear Technology, we find this circuit in a 2005 manual. The circuit...
We found this circuit in a 90s Popular Electronics. It increases the duration of a pulse in a...