His recent video shows how to put up a workable basic HF antenna in a small backyard. The center of the system is a 49:1 unun. An unun is like a balun, but while a balun goes from balanced line to ...

When you buy a cheap ham radio handy-talkie, you usually get a little “rubber ducky” antenna with it. You can also buy many replacement ones that are at least longer. But how good are they?

Description: Transmission and reception of horizontally polarized waves over medium to long distances The compact, rotatable HF Antenna R&S®HL471 can be used for transmission and reception of ...

High-frequency or HF radar is a shore-based remote sensing system used to measure offshore water surface currents by sending a low-power electromagnetic pulse over the water surface. The ...