Johnson's Techworld

Just now there was a pass of AO-123 amteur radio satellite, which is also known as ASRTU-1. Uplink frequency is 145.850 MHz, with a CTCSS tone of 67

Had a fairly busy pass of International Space Station today evening, with VU2PEP, VU2ADV, VU2NXG and possibly DX station at the beginning of the pass. Thought that DX

SO-50 has always been an evasive bird for me because of the need for dual tone. 74.4 Hz CTCSS tone is needed for activation and then 67 Hz

Solar panels have photovoltaic cells which convert solar light energy to electrical energy. For off grid solar energy systems, the electrical energy produced has to be stored in

Most radio amateurs are interested in building their own DIY off grid solar power source and so am I. TOPCon, short for Tunnel Oxide Passivated Contact, is an advanced

Though there was a slight drizzle I decided to use my Moxon Yagi to try the 10:05 UTC pass of International Space Station. It was an Eastern pass

I used my Moxon Yagi along with RTL-SDR connected to Gpredict and SDRSharp software in my laptop. The two softwares were connected to each other by a plugin.

At last I could see some signals on the SSB segment of the RS-44 pass band waterfall. Have to perfect my technique of tuning to signals on waterfall

Tried to listen to SO-50 during a pass at 7.20 am IST (UTC+5.5). As it was a near overhead pass with about 75 degrees maximum elevation, I was