Johnson's Techworld

After an initial discussion on 40m today morning, followed by a couple of email exchanges, myself and VU2MV are planning to revive the old roundtable which we used

Today morning, I could check in to several 40m nets as usual, with good signal reports both ways. After that I settled for a QSO with VU2MV, my

I am using a 200W car inverter to run the pedestal fan in my radio room. The same car inverter can be used to charge my laptop from

While technically Meshtastic is not ham radio as it uses unlicensed ISM (Industrial, Scientific and Medical) bands like 900MHz or 868MHz, this is the biggest crossover topic in

Welcome to the world of Amateur Radio (often called Ham Radio). This is a hobby that blends technology, geography, community, and public service. Whether you want to talk

One of my viewers mentioned that he prefers a sleeve dipole constructed from RG316 coax in a flat top configuration. Though it is end fed, it has a

I came across IRLB4132, an N-channel MOSFET in my UPS. That was a 600VA, 300W UPS which I had used for my desktop computer. I no longer have a desktop and

Here I am checking the output of 7812 regulator IC after connecting two 9V batteries in series to the input. After that the output is being used to

The popular 7812 regulator IC is a three terminal positive voltage regulator IC which provides a stable output. While 7805 IC provides a steady 5V DC output, 7812

Insulated Gate Bipolar Transistor (IGBT) is a semiconductor device that acts as a high-efficiency electronic switch for high-power applications. It combines the fast switching of a Metal-Oxide-Semiconductor Field-Effect