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Fred's Blog about Ham Radio, Python, Unix and more...

80-meter NVIS antenna

I live in the middle of Silicon Valley in a suburban setting with small front and back yards. My property does not have tall trees to take advantage of when installing an antenna. Given these conditions, my best option was to use a vertical antenna. I got a Hustler 4BTV …


I just got my Tech License

This article was also posted on the San Mateo Radio Club monthly news letter. In California, the majority of new hams come from an EmComm1 group. In this article, I am not going to talk about EmComm. It is a vast subject and your EmComm group is better suited …


Ham Radio Jargon for beginner

If you are a new ham checking into a repeater or someone listening to the ham radio band with a scanner, you will discover a lot of the jargon. In the following table, you will find the most common lingo you will hear on the amateur band and, more specifically …


DMR D-Star cross-mode

In my last article, I wrote about working DMR+ using the DMRGateway module of your Pi-Star hotspot. In this article, I'm going to explain how to use the same DMRGateway module to talk to D-Star networks using your DMR radio. What is cross-mode? When you talk on digital radio, the …


DMR+ with Pi-Star

When it comes to DMR, especially in North America, people think of BrandMeister. There is another network of interconnected repeaters and talk-groups called DMR+. Pi-Star hotspot. DMR+ was the first network that developed tools to interconnect ETSI Tier 2 DMR repeaters. It started in Europe and has grown in popularity …


Canadian Ice Road

I am sure a lot of you have seen the History Channel show, Ice Road Truckers. This last winter, I was in Yellowknife in the Northwest Territories, Canada, and I had the chance to drive on one of these ice roads. Yellowknife Ice Road. The Tibbitt to Contwoyto Winter Road …


APRS Telemetry

I wrote a little python program to send my iGate telemetry through APRS. The metrics include the temperature of the Raspberry-Pi, the load average, the amount of free memory, and network traffic. Sending the iGate metrics through APRS allows me to use the graph tools offered by aprs.fi or …


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