Johnson's Techworld

Major amateur radio bands have been allotted as harmonics of each other. It is not by chance, but by design. We will have a look into what are

My complex fan dipole is now ready for me to work on six amateur radio bands: 40, 30, 20, 15, 10 and 6m. Initially the fan dipole had

Today morning I was quite happy to work HS5NMF at a distance of 2780.2 km with my 80m dipole antenna. That is my first ever DX on 80m

Earlier, during tuning of 20/80m loaded coil dipole antenna of VU2XTO design, I used to trim the elements meant for 20m. Finally I ended up with very short

SO-124 (HADES-R), the latest amateur radio satellite from Spain is active and it is a 1.5P PocketQube. PocketQubes are smaller than CubeSats. 1P unit measures just 5 x

NanoVNA is a powerful tool for tuning antennas, making them more efficient and effective. This video provides a beginner-friendly guide to using the NanoVNA, covering the basics of

I had added 2.5m of wire to either side along with 122 microhenries coils on both sides of 20m elements in my multi-band fan dipole antenna. As it

I have a multi-band fan dipole antenna with elements for 40, 20 and 10m, which can also work on 15m (21 MHz) as the third harmonic of 40m

I was active on 80m in 1980s with my CW/AM homebrew radio and dipole antenna on top of tall coconut trees at my parents’ home. Now in a

I had a feeling that loading coils were eating away the power output of my radio on 80m. I presumed that from the relatively lower SNR noted on