Johnson's Techworld

You would have noted that during my antenna experiments posted earlier, there were several amateur radio bands on which SWR is a bit above the tunable limit of

Just checked the performance of my 80m dipole on 17m as it had tunable SWR on that band with the auto-tuner on my FT-710 radio. I was really

Earlier one end of 80m inverted V dipole was at 3m and other end at 2m from ground and apex at 6m. I was figuring out ways to

That was the nice CW signals from VU2GSM calling CQ on 80m, today morning, at around 6 am local time. Though there was heavy band noise, CW signals

My complex fan dipole was having reasonable SWR on 40, 30, 20, 15, 10 and 6m. I wanted to simplify the antenna a bit and improve performance on

I had found good reception of FM radio stations using my multi-band fan dipole antenna which works for 40, 30, 20, 15, 10 and 6m amateur radio bands.

I had posted about an FM radio board costing just $3 having remote control, Bluetooth, USB port, Aux in and a microSD card slot. During my experimentation, the

ISM in this context stands for Industrial, Scientific, and Medical. ISM bands are portions of the radio spectrum reserved for non-telecommunication applications internationally. They are typically used for

As I had posted earlier, I was happy with my fan dipole antenna with added coils for the 20m elements. I was able to work on six bands

Mosquito bats also known as electric mosquito rackets, are an effective tool against mosquitoes at home. It may be less effective against larger and fast moving insects like