Johnson's Techworld

Many of my friends regionally and globally are eagerly waiting for Hamfest India 2024 to be held at Kolkata on December 14th and 15th. It will be a

This image was posted by the ground team of Amateur Radio on International Space Station yesterday on X. It was reposted by a lot of amateur radio satellite

Testing LED with a multimeter is a bit different from testing rectifier diodes with a multimeter.

Now that many of us use commercial radios, band pass filters would be there or you expect them to be there within them. In software defined radios, there

VU2TEK had posted a sked for the pass of Diwata 2B (PO-101) today, at 11:28z. I thought of checking it out. It was a high elevation Western pass

Three BC547 transistors are being used in a Darlington Triplet configuration to produce a high gain amplifier which can detect the tiny static electric charge on your finger

We know that higher bands like VHF/UHF and above have line of sight propagation, meaning that it will not be heard beyond the horizon where the Earth’s curvature

Anyone interested in hobby electronics would have noted that resistor values follow a certain pattern. For example, you would have noted resistors of 220 Ohms, 330 Ohms, 470

I was listening to a pass of International Space Station with maximum elevation of about 37 degrees in my region. When the pass was at an azimuth 350

Among electronic components, dual in-line package, known in short as DIP is a device package with a rectangular housing and two parallel rows of connecting pins. I have