How to Cook a Ham…
ka9kqh...or How to Help People get Licensed, or Upgrade an Existing License. I was introduced to amateur radio by a friend and his uncle while I was still in high…
ADAFruit USB to MTR2000 Serial Cable
Update: While my coding was correct this adapter was 3 volt logic and didn't work. I ended up using an old USB to serial adapter and connection the RJ45 colors…
RF Gain, Preamps, and Attenuators; Oh My!
These controls seem to be a mystery to many. While I'll admit I may not understand or explain them well, this is what I've been told, read, and experienced over…
DMR What’s this code plug crap….
The biggest issue I hear regarding DMR (Digital Mobile Radio) is I don't understand how to program the radio. There are numerous issues, first among them is the CPS (Customer…
1/2 Wave Dipole Lengths
A 1/2 wavelength dipole is one of the simplest antennas you can build and install. Some wire (it can even be scrap/salvage) a few insulators, rope, and a feedline. These…
C-Pole Antenna
Just an attempt at preserving the calculator for C-Pole antennas. The C-Pole is a relatively easy to construct monoband vertical antenna. It can be supported on a pole or hung…
Hello world!
Having lost my previous blog to the horrors of the internet, here is another attempt. A bit about me; I'm KA9KQH an Amateur Extra license holder. I've been ham since…