Johnson's Techworld

Importance of a Good Ground Plane for Magnetic Mount VHF Antenna Hello friends, today we are going to discuss the importance of providing a good ground plane for

Live Amateur Radio Satellite Status Live status report of amateur radio satellites, Orbiting Satellites Carrying Amateur Radio or OSCAR is available at AMSAT page: https://www.amsat.org/status/index.php. There are several

What are Ground Wave, Sky Wave, Skip Distance and Skip Zone? These are terms which are often discussed while talking about amateur radio propagation. Electromagnetic waves emanating from

What is Sporadic E Propagation? Sporadic E, known in short as Es, is an unusual form of radio propagation at VHF range using the E layer of the

സൗരോർജജ പാനലുകൾ വീട്ടിലെ മൊബൈൽ, വൈഫൈ, ടിവി പ്രവർത്തനങ്ങളെ ബാധിക്കുമോ? സൗരോർജജ പാനലുകൾ വികിരണം പുറപ്പെടുവിക്കുന്നില്ലെങ്കിലും, നിങ്ങളുടെ മേൽക്കൂരയിൽ സ്ഥാപിച്ചിരിക്കുന്ന സൗരോർജജ പാനലുകൾ പുറത്തു നിന്നുള്ള സിഗ്നലുകൾ തടസ്സപ്പെടുത്തുന്നതിലൂടെ ടിവി, മൊബൈൽ ഫോൺ, വൈഫൈ എന്നിവയുടെ സ്വീകരണത്തെ തടസ്സപ്പെടുത്തിയേക്കാം

Homebrewing of My First VHF Seven Element Yagi Begins! I have not homebrewed any antenna for the past 35 years. Beyond that, I had first made an inverted

Can Solar Panels Cause Electromagnetic Interference? Just read on Twitter that one Ham Radio operator elsewhere was quite worried when his neighbour was installing solar panels as the

Know Your Coaxial Cable Well! Coaxial cable is the most common feedline used to connect amateur radio to the antenna. Coaxial cable consists of an inner conductor surrounded

Can You See Satellites in the Sky? Satellites are quite tiny compared to the other celestial objects in the sky. Still, they can be visible in a clear

How Does a Yagi-Uda Antenna Work? Yagi-Uda antenna is very popular in Amateur Radio or Ham Radio. It was also a common sight on housetops before the era