This receiver for frequencies up to 18 MHz was found in American documentation from the 1990s. Data for coil winding is aggregated.
In the figure we have a configuration that allows to test NPN transistors and with the addition of a...
This circuit can be designed with ease today, as its components are common. We found it in old...
This siren produces an intermitent sound given by the characteristics of the two oscillators using the...