With this circuit, signals in the range of 10 kHz to 150 kHz can be received at close to 4 MHz from a shortwave receiver. The circuit is from a 303 Circuits from the 90s.
In the figure we show another timer, this one is simpler because it uses only one of the four...
This instrumentation circuit is from the June 1986 issue of Radio Electronics magazine. Equivalent...
This two-transistor amplifier has good gain but delivers a fraction of a watt of power. The...