Johnson's Techworld

Heavy band noise is a problem faced by all radio amateurs operating from the cities and some from rural areas as well. There is a huge and ever

Five Eighths Wavelength or 5/8 Lambda Vertical Antenna is said to have highest gain among the vertical antennas with 3 dB gain over a quarter wave vertical antenna.

Last few days, I have been trying to improve the performance of my newly purchased End Fed Half Wave antenna for 40, 20,15 and10 m by trying out

Peformance of my End Fed Half Wave antenna was below par on 40 m, though I had 1:1 VSWR at the upper end of 20 m band. I

Performance of the EFHW which I had installed recently was suboptimal on 40 m, though it was good on 20 m and 10 m. After getting a lot

Through out my nearly four decades of Ham Radio, I have never used an End Fed Half Wave Antenna. As it is difficult to route multiple coaxial cables

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