Johnson's Techworld

I did not put a balun at the feedpoint of my 20 m inverted V dipole antenna as I did not have the raw materials to make one.

Toroids are quite commonly used in amateur radios, antenna tuners, baluns, common mode chokes and power supplies. Toroids are usually made of powdered iron oxide along with some

Usually I hear very few CW signals, if at all, on the band these days. Occasionally someone will check into Belgaum Net or Charminar Net on CW. Today

Zepp is short form for Zeppelin and is a resonant antenna end fed by a ladder line. The name comes from Zeppelin which was a type of rigid

I have used only a Philips broadcast receiver for amateur radio operations in the remote past. On the transmitting side, initially I had a solid state VU2VWN QRP

Guanella balun was invented by Gustav Guanella, a Swiss engineer as a “New method of impedance matching in radio-frequency circuits” in 1944. Balun stands for balanced line to

What is MUF or Maximum Usable Frequency? I came across a thread on qrz.com forum on probable decrease in MUF or Maximum Usable Frequency over the last year.