Johnson's Techworld

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

Many of us routinely use 40m antenna for 15m which works as third harmonic. But how many of us have used 30m antenna for 10m? I have not

Checking the total value of resistors connected in series is rather simple. You just have to add the total values of each resistor and you get the final

FUNcube Lite Payload for Jovian-1 Satellite will be supplied by AMSAT-UK. It has a U/V FM transponder, which will be of interest to amateur radio satellite operators from

Last year I had seen many of my local ham friends posting on social media on Europa Clipper ‘Message in a Bottle Campaign’. Never thought that it has reached