Hello Giulio, Here a translation of the text below DF8ZR's diagram: The Circuit The picture shows the classic design of the three stage amplifier. Only commonly available parts were used. Only the co
May some DL friends explain me in few word the article made by DF8ZR "Aktive antenne fur Langwelle", pubblished on the web site of ON7YD?? Is that an E field antenna with a narrow bandwidht for 136?