Archive for date: March 5, 2010

How not to create a new digital ham radio mode…

March 5, 2010 | Amateur Radio | By: Mark VandeWettering

You’ve had a C compiler sitting in front of you and some communications textbooks, and so you’ve done some hard work and created a new digital mode that you’d like to see widely deployed. What should you do? Well, let’s begin with what you should not do: First, you shouldn’t presume to dictate what frequencies […]

New DX spot via WSPR…

March 5, 2010 | Amateur Radio | By: Mark VandeWettering

This wasn’t quite a personal DX record for me, but it was close, and the first time I’ve heard South Africa in quite some time. I spotted ZS1LS twice this morning on 30m, from grid square JF96fd and a distance of 16477 kilometers. I had previously heard ZS6Y (16927 km) and ZS1TX (16492 km), and […]

Launching a rocket with hydrogen/oxygen combustion…

March 5, 2010 | Amateur Science | By: Mark VandeWettering

A recent issue of Make magazine had an article about launching water rockets via hydrogen/oxygen combustion: basically an electric current is used to break water into its constituent hydrogen and oxygen, which then bubbles up in the rocket, forcing out some additional water. To launch, this hydrogen is ignited, and recombines quickly into water vapor, […]