Johnson's Techworld

I had seen a video by VU3IXV illustrating reception of QO-100 Geostationary Amateur Radio Satellite using a satellite TV dish antenna and RTL-SDR. Downlink from QO-100 is in

Slow Scan Television (SSTV) transmissions to celebrate the World Space Week 2025 has been going on from the International Space Station and most of the Amateur Radio Low

Most of us will be familiar with the 2.4 GHz and 5 GHz Wi-Fi bands which are common place in our home wireless routers. Some may be aware

Interestingly, 5 GHz band is also 5 cm band. According to one source, the allocation in 5 cm band for radio amateurs in India is 5725–5840 MHz or

I have very little space to mount antennas, can manage just one telescopic pole on my tiny terrace. Hence I have pulled up all my HF antennas on

Have a look at the pass direction of International Space Station at 9.43 am today. Looks like a Western pass. But there is a snag. Maximum elevation is

Today morning during my routine propagation checks, I visited the Space Weather Prediction Center website by the National Oceanic and Atmospheric Administration of the United States. There was

Can you use homebrew ‘Twisted Flex’ as feed line? What about one piece of refurbished RG213 and half the length of homebrew twisted flex (10+5m)? Here is my