Category: Antennas

Experiments with portable, base station and highly unusual antennas

A Top Loaded End-Fed Half-Wave Antenna for 20m

Imagine this: a short, vertical antenna for 20m that requires no ground, no counterpoise or radials ... And ... no tuner. Now, let's add that it is only 14 feet tall and can be erected in just a couple of minutes. But wait, there's more: it is very lightweight, slips into a shirt pocket and … Continue reading A Top Loaded End-Fed Half-Wave Antenna for 20m →

Is an EFHW Antenna Truly Multiband?

A fierce debate rages on one of the online forums I read. Is an End-Fed Half-Wave (EFHW) truly a multiband antenna? By "multiband" I mean resonant on even harmonics without a tuner. The most vocal posters in that forum keenly disparage these popular antennas despite their popularity. Resonant on every band, earn DXCC in a … Continue reading Is an EFHW Antenna Truly Multiband? →

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? →

CLEFHW antenna: Ready for Action

In the last post I introduced a crazy, off-the-wall idea for a variation of the popular End-Fed Half-Wave (EFHW) antenna. I called it the CLEFHW - Coil Loaded End-Fed Half-Wave. Its purpose is to allow backpack portable operation of an electrical half wavelength antenna without the need for a tree or pole to suspend a … Continue reading CLEFHW antenna: Ready for Action →

Antenna Height Matters – True or False?

How often have you read that an antenna should be placed as high as possible - the higher the better? Is it true? My inner skeptic says "hmm, maybe". It's certainly an aphorism that is open to scrutiny. Aphorism? The American Heritage® Dictionary of the English Language defines "aphorism" as: "a tersely phrased statement of … Continue reading Antenna Height Matters – 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 →

Can a Drinking Straw Help Tune an Antenna?

A stainless steel drinking straw DIY QRP L-match. We'll get back to the drinking straw question in a moment, but first let me describe another new project that took shape on the Ham Radio Outside the Box workbench recently - a QRP L-match. You may recall that we recently described a Z-match builder project that … Continue reading Can a Drinking Straw Help Tune an Antenna? →

A Deep Dive into the Antenna Called “Long Tall Sally”

Back in the spring of 2024 Ham Radio Outside the Box introduced a very unusual field expedient portable antenna for 20m. It was dubbed "Long Tall Sally" because we took a standard quarter wave ground plane, stretched the vertical radiating element way out of resonance, then restored resonance by shortening the radials. This is what … Continue reading A Deep Dive into the Antenna Called “Long Tall Sally” →

“Old Barebones” – A QRP Z-match Builder Project

I actually don't like Z-matches very much, so why did I build one? I'll get to that in a moment, but first I should explain why I am not a fan of the Z-match. These devices comprise two variable capacitors and one fixed inductor. The fixed inductor limits the tuning range compared to other types … Continue reading “Old Barebones” – A QRP Z-match Builder Project →