The Signal Lab | HF Vertical Antenna Lessons | Greyline
The Signal Lab
Every lesson we have published on HF verticals, in one place: how antennas capture signal, where the losses hide, what the tuner can and cannot fix, how to ground, and why the bands open when they do. Each one traces to a book on the Bookshelf — the ARRL Antenna Book, Kraus, Maxwell, Severns, and the rest — so you can check our work against the people who wrote the physics down.
Start with the short answers. Go deeper by topic.
Short answers
What height HF vertical should I buy? Every height works every band; height sets how much antenna you have.
How to read antenna gain Why a little negative dBi can be a lot of antenna.
What is a vertical dipole? Both halves in the air, so no radial field.
My SWR is low. Why am I still losing signal? The loss the meter cannot see.
Do I need an antenna tuner? Shack or remote, and when each makes sense.
Do I need to ground my vertical? Safety ground and RF ground are different jobs.
What is grey line propagation? The twilight band our name comes from.
Why can I work Europe but not the next state? The skip zone, explained.
Height, aperture and gain
What your antenna actually grabs Effective aperture, in Kraus's terms.
Why your antenna hates 80 meters Radiation resistance and the low bands.
20 meter vertical: which height works best? Where each height earns its bonus bands.
Nine feet you have not used yet What the whip actually buys.
“No radials” means two things Only one of them works.
The other half of your antenna has to go somewhere Where return current lives.
Feedline, chokes and SWR
Where the choke goes The matched side, every time.
Current balun vs voltage balun Why the feedpoint gets a choke.
Can I use a 4:1 balun on a vertical dipole? The short answer is no, and here is why.
A match is not a result What 1:1 SWR does and does not tell you.
Why your tuner cannot fix a jumping SWR Common-mode current, and the cure.
Feedline physics Why coax choice matters at HF, with the loss calculator.
Tuners
Indoor vs remote antenna tuner Where the ATU belongs.
The RT-100 remote tuner Why we pair it with our antennas.
Feed system configuration Tuner, choke and coax, in order.
Grounding and lightning
Ground is two jobs wearing one name Safety and RF, separated.
Three grounds walk into a shack Lightning, RF, and the bond between them.
Propagation and the bands
What is the greyline? The twilight band that carries DX.
Low band and WARC primer 160 through 12 as the cycle turns.
10 and 6 meters are still open What the solar data says.
DXpeditions this month Who is on the air, and where.
Where you live
Real HF from where you live Townhouse and condo options.
Where to mount an HF vertical Height, water and ground.
The quiet sentinel Your neighbor's EmComm flagpole.
Why DXpeditions choose vertical dipoles The same reasons work in a backyard.
The HOA and XYL approval hub The Brief, the neighbor FAQ, and the law.
Owning a Greyline
The fall checkup Five minutes that save your winter.
The stainless swap Clean, grease, snug, and the one never.
Every Greyline has a tilt now The Tilt-Up Base and the XL.
Why your Greyline ships in two boxes And what arrives in each.
Assembly documents Every manual and drawing.
See it in the field.
The lessons above are the physics. Field Reports are what operators do with it, from HOA lots to an Icelandic shore. When you are ready, choose your height — every one works every band, 160 through 6.
A question the Lab does not answer yet? Call 435-200-4902 — an operator answers, and the good questions become the next lesson.
73, Jon KL2A
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