A very simple shortwave radio receiver circuit can be designed using circuit diagram bellow.
This shortwave radio receiver circuit is based on 2N2222 transistors and has and has an operating frequency range between 6 and 17 Mhz .
All coils are designed using an inch diameter pvc pipe and 20 gauge insulated hookup wire, L1 require 6 turns and L2 require 14 turns.
This 20dB antenna amplifier circuit is a very simple antenna amplifier circuit that use few common transistors and some resistors.
This 20dB antenna amplifier circuit can be useful for signal waves with a frequency between 0.1 to 400 MHz.
A very simple active antenna circuit can be designed using this circuit diagram.
This active antenna circuit is based on transistors and other few common electronic components .
This RF circuit provide a 14-20dB gain at the popular short-wave and radio-amateur frequencies of 1-30MHz.