Johnson's Techworld

Grounding for My CP22E VHF Antenna Last week I had installed a new CP22E VHF antenna. But due to shortage of time I could not install a ground

What is NanoVNA and How is it Useful for the Radio Amateur? NanoVNA is a handheld Vector Network Analyzer useful for measuring and analyzing radiofrequency circuits. NanoVNA works

Choke Coil in VHF Antenna Coaxial Cable This picture shows the choke coil in the coaxial cable when I mounted the CP22E VHF antenna. Manufacturers have suggested one

Assembling My New CP22E VHF Antenna Started assembling my new CP22E VHF antenna with the help of my son. Unpacked all the components and inspected them. CP22E is

SO239 and PL259 UHF Connectors Even though they are often called UHF connectors, SO239 and PL259 are used for HF and VHF work as well. They are also

My Magnetic Mount VHF Antenna This magnetic mount VHF antenna has a magnetic base. It can be easily mounted on the bonnet of a car or even on

My VHF Base Station Going Strong After Quarter Century! This VHF base station was purchased in 1998 and was being used regularly. Initially I was using a ground

അമേച്വർ റേഡിയോയ്‌ക്കായി ടിവി കേബിൾ ഉപയോഗിക്കാമോ? ടിവി കേബിളിന്റെ സാധാരണ ഇം‌പെഡൻസ് 75 ഓംസ് ആണ്. എന്നാൽ ഒരു അമേച്വർ റേഡിയോയുടെ ഔട്ട്പുട്ട് ഇം‌പെഡൻസ് 50 ഓംസ് ആണ്. അതിനാൽ അമച്വർ റേഡിയോയ്ക്കായി ഒരു ടിവി കേബിൾ ഉപയോഗിക്കുകയാണെങ്കിൽ

What are LEO, MEO and GEO Among Amateur Radio Satellites? The classification into LEO, MEO and GEO applies to satellites in general and not just Amateur Radio satellites.

Collection of Videos Related to Antenna and Transmission Lines in Amateur Radio