So many words have been written about the popular End-Fed Half-Wave antenna that you would think it would be "settled science" by now. For several years I have been building EFHWs according to accepted wisdom, but my inquisitive mind always seeks to question why they are built that way and could they be improved? You … Continue reading Venturing Outside the Box with the End-Fed Half-Wave Antenna
Category: Builder Projects
Antennas: a Riddle Wrapped in a Mystery Inside an Enigma
I owe the title of this post to Sir Winston Churchill who once used it to describe a country that is prominently in the news at the present time. It seemed an appropriate description for ham antennas too because the more I know about antennas, the more I realize how much I don't know. Maybe … Continue reading Antennas: a Riddle Wrapped in a Mystery Inside an Enigma
Can a Manual L-match Get the Job Done?
Or can it be made just a little bit better? In part 3 of my manpack series of posts I discussed how and why I replaced a perfectly good LDG Z-11 Pro autotuner with a home-made manual L-match. To summarize, the autotuner was doing a great job but was using too much space inside the … Continue reading Can a Manual L-match Get the Job Done?
Building a Manpack – Part 2, the QRP Rig
As in Part 1, let me define what I mean by "manpack". My manpack is a manually transportable, rapidly deployable, field expedient complete radio station for operating while pedestrian mobile or pedestrian stationary. Complete station fits into a plastic "50 caliber ammo case" The complete station - radio, battery, paddles, phones and antenna fits neatly … Continue reading Building a Manpack – Part 2, the QRP Rig
Building a Manpack – Part 1, the Antenna
To start, let me define what I mean by "manpack". My manpack is a manually transportable, rapidly deployable, field expedient complete radio station for operating while pedestrian mobile or pedestrian stationary . The HFpack group of /PM enthusiasts are the experts in operating Pedestrian Mobile. Personally I prefer the Pedestrian Stationary style of operating. The … Continue reading Building a Manpack – Part 1, the Antenna
Year End Review
I am very pleased to learn that Ham Radio Outside the Box appeared in 2 of the top 10 posts in 2023 on Ham Radio Weekly. The post "A strange but proven antenna" occupied 8th place and "A 200ft wire antenna up zero feet" came in at 4th place. Many thanks to Cale K4HCK who … Continue reading Year End Review
A Simpler Field Expedient Rybakov Antenna for Winter
I recently received an email from Frank Barnes W4NPN who maintains an excellent website with an index of downloadable issues of the Hot Iron Newsletter. The latest issue contains a link to a PDF document from the late G3XBM that discusses a commercial Rybakov antenna manufactured in the UK (no longer available) called the X80. … Continue reading A Simpler Field Expedient Rybakov Antenna for Winter
Making Math Easy for Ham Radio Experimenters
If you buy all your equipment and spend most of your on-air time simply chatting to friends, then keep calm and carry on; you are doing us all a favor by keeping the bands alive. Some of us, on the other hand have to take a look "under the hood" to learn what is really … Continue reading Making Math Easy for Ham Radio Experimenters
A Simple DIY “Unikeyer” Based on the K3NG Design
I have two main rigs for operating outdoors, mainly for Parks on the Air (POTA) activations. I dream that one day I will have three, but my order for a QRP Labs QMX is on a never-never delivery list - well maybe one day! Rig number 1 is a Yaesu FT-891 which, although capable of … Continue reading A Simple DIY “Unikeyer” Based on the K3NG Design
An Upside Down Antenna?
What do you call an end-fed three quarter wave antenna with a quarter wave counterpoise? Or is it an end-fed full wave antenna with a folded quarter wave section? Or maybe even an end-fed half wave fed with ladder line? Here are some hints. It doesn't need any ferrite toroidal cored transformers; so no hysteresis … Continue reading An Upside Down Antenna?
Ham Radio Outside the Box 