Johnson's Techworld

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

We had a near radio black out on the 40m band at around 6.55 am local time (0125z). We were having our regular roundtable on 7050 kHz, with

I first heard of Dayton Hamvention last year when my Twitter profile started flooding with images on Hamvention 2023. Sometime later I had a similar situation with HamCation

Stepper motors move in steps unlike the continous motion of usual motors. With each pulse given to the stepper motor, the shaft rotates at a fixed angle. Stepper