This circuit was found in a British documentation from 1969. It can be implemented with modern transistors. The pass band is 6 MHz.
This circuit amplifies signals from 0.5 Hz to 300 kHz. We found it in an old documentation. Equivalent...
Of course, the range of this transmitter found in a 1992 documentation is not exactly 4 km, as it...
Using a PLL this circuit can generate signals of up to 500 kHz which is basically determined by the...