Johnson's Techworld

An antenna tuner affects the heating and power handling capability of the toroid in a balun or unun by altering the impedance match and SWR between the tuner

Today was a very fruitful day for the technical roundtable on 7135 kHz. Discussion started off with VU23KM who had recently upgraded from VU32KM in a short period

Today I was quite surprised to see this note: “”Hi, Is this the same net I used to listen to in the late 90’s early 2000’s as a

Yesterday VU2JN Technical Roundtable on 7135 kHz was listened to by VU3CDK on VU3TBU WebSDR while in transit! He suggested simultaneous 20/40m operations and listening on WebSDR as

The power handling capacity of a 1:1 current balun on a toroid is primarily determined by its ability to manage heat dissipation and avoid magnetic core saturation. The

As scheduled yesterday, VU2MV and myself joined on 7035 kHz at around 745 am, which was the roundtable frequency with VU2JN and others four decades back. VU2JN was

I have an HP printer which can also scan documents and print them. It is Wi-Fi enabled so that you can also print from your mobile phone which

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