Johnson's Techworld

Cobweb Antenna is a small, light weight, multiband antenna, typically covering five ham radio bands from 14 MHz to 28 MHz. Cobweb antenna requires only one support and

My First Attempt to Hear GreenCube Failed, Why? I have been able to listen to the digipeater signals from International Space Station during its pass overhead even though

How Will VHF Ham Radio Antenna Perform on UHF? It is well known among Ham Radio operators that a 7 MHz dipole antenna will work at 21 MHz

ജെ പോൾ ആന്റിന 2 മീറ്റർ, 70 സെന്റീമീറ്റർ പ്രവർത്തനങ്ങൾക്കായി ഹാം റേഡിയോ ഓപ്പറേറ്റർമാർക്കിടയിൽ പ്രചാരത്തിലുള്ള ഒരു വെർട്ടിക്കൽ ഓമ്നിഡയറക്ഷണൽ ആന്റിനയാണ് ജെ പോൾ ആന്റിന. ഇത് ഒരു എൻഡ് ഫെഡ് ആന്റിന ആയതിനാൽ, ആന്റിനയുടെ ഹാഫ് വേവ്

Is Monopole Antenna Used in Ham Radio? All of us are familiar with various types of dipole antennas like inverted V and horizontal dipole antennas. What about monopole

What is a Whip Antenna? Whip antenna is a common sight on four wheelers these days as most of them have a built in radio, often covering FM

Checking SWR with a Cross Needle SWR Meter Checking SWR using a patch cable to connect the SWR meter between the radio and the antenna was discussed earlier.

How to Work International Space Station Using APRS Packet Radio? APRS stands for Automatic Packet Reporting System and serves as a digital communications channel for Ham radio, using

Clipperton DXpedition 2024! When I came to know of Clipperton DXpedition planned for January 2024, it brought back nostalgic memories, not of working the DXpedition on air, but

What is a Linear Satellite in Ham Radio? FM satellites are like orbiting repeaters which pass overhead several times a day and Ham Radio operators can communicate through