Category: Amateur Radio (Ham Radio)

Last year there was quite a buzz about the launch of an APRS balloon from an engineering college, in our LEO Satellite Repeater Contact Group. The launch was

Here I am demonstrating the extreme radio frequency interference from a small switch mode power supply (SMPS) powering the external speaker of my laptop. You can see the

I have been hearing of lithium iron phospate battery ever since I came back to ham radio last year and became active on Twitter (X). Initially I used

I am sure that all of you who have visited qrz.com would have seen the Solar-Terrestrial Data Banner by N0NBH. I have also been seeing it for quite

After the recent G5 Extreme Geomagnetic Storm which knocked out global HF radio propagation, I have been monitoring the NOAA Planetary K index or Kp index regularly. On

Slanting V Mounting of EFHW Takes Signals Over Four Thousand Km on 15m band, with excellent VSWR of 1.1:1. Had higher VSWR on other bands, but I am

Yesterday, I saw a nice discussion by Steve WA5FRF in the Ham Radio Science Citizen Investigation (HamSCI) Google Group. I am summarizing it here for the benefit of

Recent G5 Extreme Geomagnetic Storm with disruption of HF propagation led to discussions on prediction of geomagnetic storms. Deep Space Climate Observatory, or DSCOVR launched in 2015 allows

Recent G5 Extreme Geomagnetic Storm and sudden radio blackout in our region prompted me to learn more about geomagnetic activity. I have been seeing posts on Kp index