Last month I wrote some about making a notch filter for the AM band. However, before you have any signals to notch out, you must first, of course, have some signal to begin with. Let’s talk a little ...

Dealing with an antenna is one of those topics we never feel like we know enough about. MIT had a live stream of [Dr. Kiersten Kerby-Patel] discussing antennas in a talk, sponsored by the ham radio ...

Using digital techniques has caused a resurgence of interest in VLF — very low frequency — radio. Thanks to software-defined radio, you no longer need huge coils. However, you still need a suitable ...

I have always been fascinated by Magnetic Loop Antennas. While I’m not a fanatical radio ham (I only go on air occasionally and for short periods—I'm not really into contests but rather enjoy ...

I am a 13-year-old amateur radio operator, and a Boy Scout. Ham radio operators help their communities by communicating during natural disasters and other events where normal communication such as ...

Abstract: An apparatus designed to measure field patterns of circular-loop antennas immersed in fresh water is described. Measured field patterns are presented to show the differences between bare and ...

Fans of disaster movies or actor Jeff Goldblum may recall the iconic 1996 alien invasion film "Independence Day," which featured a pivotal scene where protagonist David Levinson, a cable company ...