Johnson's Techworld

From LEOs to MEO: Aiming GreenCube I have been intrigued by the GreenCube (MT-CUBE-2, Italy Oscar 117) Medium Earth Orbit (MEO) Amateur Radio Satellite ever since I started

I was testing SSTV (Slow Scan Television) reception from International Space Station using my vertical antenna without Doppler correction. In the frequency display you can see that it

Directional Delta Loop Antennas Delta loop antenna is a full wave length antenna in the shape of the Greek alphabet Delta (Δ). A single delta loop antenna has

World Radiosport Team Championship (WRTC) 2026 I had mentioned about Amateur Radio Direction Finding or Fox Hunt as a popular form of radio sport among amateur radio (ham

What is CHIRP in Amateur Radio? I have been hearing about CHIRP in discussions on programming amateur radios. Just thought of having a look at what it is.

Should I Go For ICOM IC-7300 HF Amateur Radio? I have been toying with the idea of going in for an HF Amateur Radio ever since I returned

How Far Can Ham Radio Signals Reach You? It is a question often asked in various fora by those interested in becoming a Ham or Amateur Radio operator.

Receiving ARISS (Amateur Radio on the International Space Station) with My New Moxon Yagi! What you heard just now is the reception of Amateur Radio on the International

What is Starlink Satellite Train? Starlink Satellite Train is a spectacular view in the night sky if you are lucky enough to watch the constellation of Starlink satellites

How to Check Overlapping Passes of Satellites Using SatMatch Suppose you have a friend located somewhat away from and you wish to have a satellite contact with him.