Duplexer
A duplexer is a device that allows bi-directional (duplex) communication over a single channel. In…
Antenna Loading Coil
An antenna loading coil is an inductor placed in series with an antenna element in…
What Is Cavity Filter
Cavity filters are the basic circuitry behind a Duplexer and are sharply tuned resonant circuit…
APRS Digipeater Kenwood D710a
APRS Digipeater Kenwood D710a
APRS And Kenwood
Bob Bruninga WB4APR talks about his relationship with Kenwood and APRS The Kenwood TH-D7AG Data…
ATrack – APRS Client For OpenMoko Freerunner
APRS tracker and communicator for mobile devices written in python / elementary. Targeted especially for…
How To APRS Via Smartphone Or iPad
Please do not copy this article without credit or backlink to my original post. How…
How Make Your Own G5RV Antenna
How Make Your Own G5RV Antenna
Short Wave Listening Fun
Shortwave listening demonstration. Hear a sampling of foreign and domestic broadcast stations, time standard signals,…