Johnson's Techworld

HS19IARU is the special event station commemorating 19th IARU Region 3 Conference 2024, to be held in Bangkok, Thailand from November 4-8, 2024. The Radio Amateur Society of

In the simplest sense, frequency changer or frequency converter is a device which can change the frequency of an alternating current. It could be changing the frequency of

Oscillator in electronics is a circuit which produces periodic oscillations or alternating signal which could be a sine wave, square wave or another type of wave. The oscillator

I have been hearing about the low noise level for loop antennas for a long time and always wanted to try out one. Two problems faced by me

One of the important uses of transistors in electronic circuits is as an amplifier, though there are other uses like in switching, oscillators and frequency changers. Amplifiers are

My earlier attempts at checking in to morning SSB HF nets on CW were unsuccessful as I could not setup my FT-710 radio to TX on CW while

Though I have worked several stations from Europe during the past 10 months with my new FT-710 radio, I had to wait for the CQWW DX Contest 2024

Unlike direct current, alternating current reverses direction of flow periodically. Rectifier is a device which converts alternating current to direct current. It does this by cutting off one

In spite of a solar flare yesterday and band predictions being just ‘fair’ as per the Solar Terrestrial Data on QRZ.COM, 20m band is open here early morning.