Johnson's Techworld

I was tuning around with my revised full wave loop antenna for 40m to check performance on other bands. So far I had not seen SSB signals on

I had homebrewed a ladder line along with a full wave loop antenna for 40m using 60m long 2.5 sq mm insulated copper wire. ‘Steps’ of the ladder

I had posted my view on why my ladder-line with full wave loop antenna meant for 40m was not tuning well on 40m, while it had good results

My full loop antenna with 40m of wire for the loop and 10m homebrew ladder line has been working well on 20m and higher bands with ATU-100 tuner,

Bought a car inverter rated for 200W online so that I can charge my laptop while on the move. But car cigarette lighter socket is rated for only

I am having an FT-710 radio with peak envelope power (PEP) on single side band (SSB) of 100 W. My license class permits me to use 400 W

Metal Oxide Varistor is often used as a surge and spike protector in electronic circuits. They function by shunting the extra current as their resistance drop markedly beyond

Recently a viewer asked me whether I had opened the extension board with multiple sockets and spike protector and mentioned that they contain Metal Oxide Varistor (MOV). Had

I have been having difficulty in tuning my 10m long ladder line to my 40m nearly folded dipole antenna. Searched and found a good reason on KV5R.COM. Lengths

Today evening I was quite surprised to hear a very strong signal on 20m from VU2GNL, just 283.6 km from my location. That was on 14.215 MHz at