UHF Hentenna
I wanted a portable some what directional UHF antenna that I could use for path testing for linking for some time and after looking over a bunch of different Google search results I decided to try making a Hentenna. The …
Using a RTL-SDR Dongle to Measure FM Deviation
I’ve very successfully used the Bessel Null / Modulation Index method using a rather crude test setup. First I made a audio patch cable with a PTT switch to go from my laptop to my handheld. Then I plug in …