Johnson's Techworld

One of my ham friends told me that he is using an HF linear amplifier with SD2933. It is an RF power N-channel MOSFET. An interesting fact in

I have been experimenting with various changes to finally achieve fully off grid power supply for my amateur radio shack. Started off by purchasing 180W monocrystalline PERC solar

As a continuation of my off grid solar efforts to power my ham radio shack, I have bought a rechargeable fan as well, from https://amzn.to/4hIhMUX! Please note that

Today morning VU2HSM announced the Vadakara Ham Meet 2026 during Charminar Net on 7080 kHz. Last time it was conducted in 2023 and plenty of amateur radio operators

I asked Google AI whether there is any advantage for analog multimeter over digital. Analog multimeters are supposed to be better for visualizing rapid changes and providing real-time

Well, I had not heard about them, though I recently posted on the possibility. Then one of my online friends told me that there is plenty of material

I had bought a 180W Monocrystalline PERC solar panel to build an off grid power supply for my ham radio shack. It was not giving good results as

Maximum theoretical power conversion efficiency of a full-wave rectifier is 81.2%, while that of a half-wave rectifier is 40.6%. Remainder is lost as heat, mainly due to the

I was using a quarter century old linear power supply for my IC-2730A radio for Low Earth Orbit satellite operations, mostly through the Amateur Radio on International Space

Some time back I had posted about the popular 7805 Voltage Regulator IC and also demonstrated Voltage Regulation with IC 7805. That is a simple linear regulator. They