Tag: Ground

A Quick and Easy QRP Emergency Field Antenna

I once drove to a park about 45 minutes away from home to do a POTA activation then realized I had left my antenna at home. <<Panic>>. I improvised by digging a 33ft wire out of my pack, cutting it in half and hastily erecting a V-dipole with its ends only about 10ft above the … Continue reading A Quick and Easy QRP Emergency Field Antenna →

How Can A Lossy Wire on the Ground Work Better Than A Quarter Wave Vertical Antenna?

Let's get real here! If we lay a wire antenna on the ground, surely It can't radiate more power than that cool-looking, expensive quarter-wave whip you just spent a small fortune to buy? Well, yes it can - but with a few caveats. We can use a trick of geometry to support our claim. Our … Continue reading How Can A Lossy Wire on the Ground Work Better Than A Quarter Wave Vertical Antenna? →

Loading Coils are Lossy. True or False?

Everybody knows That's how it goes Everybody knows Everybody knows loading coils are lossy so it must be true eh? No need to question what "everybody knows" - unless you think outside the box. Well, that's the primary mission of this blog so let's take a look at the proposition that "loading coils are lossy" … Continue reading Loading Coils are Lossy. True or False? →

Rebuilding the Winter Rybakov Antenna

Almost a year ago I wrote a post entitled "A Simpler Field Expedient Rybakov Antenna for Winter". It is worthwhile to read that post to understand why I felt it necessary to make a winter version of a proven, tried and trusted antenna. My home turf is southern Ontario, Canada about 200km northwest of Toronto. … Continue reading Rebuilding the Winter Rybakov Antenna →

Magically transform a single band ground plane into a multiband antenna – instantly

I call it "electromagnetrickery". You can learn a lot by building your own antennas, much more than if you buy commercial ones. But beware, it becomes addictive - I have a drawer full of empty wire spools to prove it. Sometimes the behaviour of those pesky electromagnetic wavicles delivers unexpected surprises. Here is the story … Continue reading Magically transform a single band ground plane into a multiband antenna – instantly →

A Versatile Solution for Backpacking with the QRP Labs QMX

Solar cycle 25 is rapidly approaching its peak. That means propagation conditions are very favorable for QRP operations again. Add to that the ever increasing popularity of outdoor operating programs like Summits on the Air (SOTA) and Parks on the Air (POTA) and there has never been a better time to hit the Big Blue … Continue reading A Versatile Solution for Backpacking with the QRP Labs QMX →

Improving a Ground Tuning Unit – using binary coded inductance and capacitance

There are 10 types of people in this world; those who understand binary notation and those who don't. Some years ago I experimented with using a Ground Tuning Unit (GTU a.k.a. Artificial Ground) to replace radials/counterpoises on my field expedient vertical antennas. A GTU is simply a series L-C tuned circuit with a current sensor … Continue reading Improving a Ground Tuning Unit – using binary coded inductance and capacitance →

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 →

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 →