Category: DX Commander

This video explains SWR, how to calculate it – and should we worry about it?

https://youtu.be/b9UUClfItrs – 7 Different Antennas
https://youtu.be/2sJkPpaNseE – Tune Any Antenna

What is gain, how do we measure it? We look at some real-world examples and show you the difference between Effective Radiated Power (ERP) and Effective ISOTROPIC Radiated Power (EiRP).

https://youtu.be/G8DpvfEwyGs – Decibels
https://youtu.be/UOMOogP7Z2w – Isotropic

A closer look at seven different antenna types; Ground Plane, Dipole, Yagi, Long Wire, 5/8th, Fan Dipole and Loops. Callum.
https://youtu.be/bsU-DoQQ3gc – Link to video discussed

In this video, we discuss the basics of coax and ladder line (balanced feeder). We look at PL259, N-Type, SMA and BNC connectors.
https://youtu.be/SnEfMDh2B3M Coax Loss Video – discussed in video

Also see this Podcast:
https://www.youtube.com/playlist?list=PLcC64tNkZB7xvc3rHlpqqCkiBdAzYe8cf Full Course Here

The recent rule-change means that under supervision, and making sure the "rules of the road" are followed, you can allow another person, including children to use your radio equipment. Let’s follow Isabella’s story and get inspired to do the same. What do you think? Callum.
https://youtu.be/DdvueID3y2U Full interview with Matt

This is an amazing story. Matt is Isabella’s Dad. He’s a STEM volunteer (sometimes also called STEAM) – this means that Matt has access to training, resources and equipment to deliver short, fun amazing little projects to inspire and educate others. His story is fascinating. Please watch and be inspired too! Callum.
PS – Isabella’s "cameo" appearance will appear shortly..

Listen in, chat, call in, what ever you like. It’s just for fun. Callum.

Short video explain what Analogue to Digital is and also Digital to Analogue. We look at bit-depth and sample rate which both have an impact. CDs for instance have a sample rate of just over 44kHz and 16 bit sampling rate. Let’s understand what this means. Callum.

How can an antenna have a NEGATIVE gain – and still work great? I often quote gain in NEGATIVE numbers. What is that – and why do they work? Let’s unpick dBd and dBi and why we need these numbers to benchmark our antenna results.

https://youtu.be/bPAXxzwq8H8

This calculator will tune any wire antenna – as long as you know where it’s resonant now – and where you want it to be resonant. Have confidence, it works on quarter waves (verticals or dipoles), loops and EFHW antennas! Callum.
https://youtu.be/BYF3FWV3nG0 – The older video I mentioned