This circuit was found in a Philips documentation from 1967. The circuit uses components from the time that have current equivalents such as BC548 for transistors.
This booster for listening to signals in the range from medium waves to 30 MHz was found in a 1998...
In the figure we show our first circuit that consists of a simple touch switch capable of driving a...
Using a 7400 we have a short-wave transmitter from 4 to 9 MHz, shown in the figure. The coil...