Matching antenna (CB7458E)

The coil and sockets of this circuit found in a QST depend on the frequency band that is intended to be tuned.

VFO With Ceramic Resonator (CB12454E)
Using a ceramic resonator, it is possible to vary the frequency between 4.9 MHz and 5 MHz. The...
Phase Delayed Trigger with Diac (CB12991E)
The circuit in the figure can be used to trigger a triac or even a comparator in a project that...
On and Off with SCR (CB25060E)
This is a circuit with two switches, one turns on and the other turns off for DC loads using SCR....