Articles in the HamRadio category

DMR+ with Pi-Star

When it comes to DMR, especially in North America, people think of BrandMeister. There is another network of interconnected repeaters ...

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 ...

Common mode current and chokes

Tech day in Sacramento This Friday, I was invited to Sacramento to give my presentation on common mode current, what it is, and how to ...

Measuring Toroid Attenuation

I needed to remove some RF noise from an air filter in the next room. When the fan turns on, the background noise raises my radio S ...

D-Star with an Icom ID-4100

A couple of weeks ago I got a new D-Star mobile radio. The radio is an Icom ID-4100, VHF/UHV. According to Icom, this rig is a D-Star1 ...

High Altitude Weather Balloon.

A few months ago, I watched YouTube videos about ham radio operators launching high altitude balloons. They carry a tracking device and ...

Battery board with protection cut-off

A couple of months ago I designed a convenient Battery Monitor board with a voltmeter, one Andeson PowerPole connector as well as a USB ...


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