Author: Johnson Francis

Usually the number of sunspots vary in an eleven year cycle known as Schwabe Cycle, which is better known as just Solar Cycle. We are currently in the

Soon after I started coming back on HF in my second innings in Ham Radio, it was VU2TUM who told me that several radio amateurs from different parts

Today morning there was a good pass of International Space Station with maximum elevation of about 24 degrees, on the Western side, starting from 0147z. I was quite

LAPAN A-2, also known as IO-86 or Indonesian Oscar 86 is an Indonesian amateur radio satellite launched by ISRO from Sriharikota, India, in 2015,  and has an orbit

Today evening I was lucky to have my first ever overseas contact through the Amateur Radio on International Space Station. It was a pass of International Space Station

Crimping Type of PL 259 coax connectors comes in handy when you find soldering the outer conductor difficult!

What is Special About VRLA (Valve Regulated Lead Acid) Batteries? Sealed Lead Acid Battery, Sealed Maintenance Free (SMF), Precautions for VRLA, Vent in flooded lead acid battery, Can