This electronic Morse Key for telegraph message transmission was found in an American 1980s amateur radio documentation. The circuit uses TTL technology and must be powered by a 5V voltage.
The resonant circuit depends on the crystal frequency that can go up to a few megahertz. The...
Circuits and devices can be tested using the tester. The visual indication of the state of the...
This oscillator can generate 2 to 10 MHz signals and was found in an American 1980s documentation. The...