The Skyline 37: The Most Antenna We Build
This is (currently) the tallest vertical Greyline builds. Take the 28-foot DX Vertical, add the 9-foot DX Whip, and you stand 37 feet of aperture into the sky with no flag and no compromise. It carries the most gain in the line — about +4 dBi on 17 meters — and the most aperture on 40, 80, and 160.
Here is what that height buys you, band by band, with no marketing fog.
What 37 Feet Is For
Height is the one upgrade every band rewards. This is the most of it we make.
Why Add The Whip At All
A bare 28-foot vertical is already a strong antenna. So why nine more feet on top? Because adding length moves the antenna's peak down the bands. The whip does not give you a higher band; it gives you a lower one — and it adds radiator on 40 and 80, where every backyard vertical is electrically short and every foot counts. Cycle 25 is sliding down the back side of a very good set of peak years. 10, 12, and 15 meters will see dips for a few years, and 17, 20, 30, and 40 will carry the DX. The whip addresses exactly that.
The Gain, Band By Band.
We model our antennas rather than guess at them. Bob Zavrel, W7SX, modeled every Greyline height in NEC — total height, feedpoint section included — against an ideal quarter-wave standing on a full field of buried radials, which sits at 0 dBi. Here is the Skyline 37:
| Band | Modeled gain |
|---|---|
| 40 m | +0.4 dBi — ahead of a full-radial quarter-wave, with no radials |
| 30 m | +1.5 dBi |
| 20 m | +2.9 dBi |
| 17 m | +4.0 dBi — the peak, pushing toward 20 |
| 15 m and up | Multi-lobe pattern (see below) |
How to read these numbers: 0 dBi is the textbook quarter-wave on dozens of buried radials — the antenna almost no small lot can hold. Every number in this table is at or above it. A decibel is about the smallest change an ear can hear; 3 dB doubles your power. How to read antenna gain →
Where it shines, 40 through 17 meters. Every band from 40 to 17 is ahead of the full-radial quarter-wave. The gain climbs steadily down the stack and peaks on 17 meters at about +4 dBi — the highest number in the Greyline line — with 20 meters close behind. On 80 and 160 the extra length is aperture the band rewards: small-lot operators working 500 to 1,000 miles down there are delighted to be in the game.
Where it gets interesting, 15 through 10 meters. On the higher bands a radiator this tall starts behaving like an extended double Zepp, the pattern breaking into multiple lobes. That is not a defect, it is physics: some of those lobes point at useful angles and some do not, and plenty of operators enjoy 10, 12, and 15 on it. We would rather you know that going in than discover it on the air.
How We State A Claim
We model the gain, we name the bands where the pattern gets complicated, and we say so out loud. That is the difference between a spec sheet and a sales pitch.
Who This Is For
Reach for the Skyline 37 if 17 and 20 meters are home and you want every decibel height can give you there, with the most low-band aperture in the line underneath. Reach for it if you want the tallest, most capable vertical Greyline makes and you do not need the flagpole disguise.
If you are in an HOA and need the antenna to read as a flagpole, the Skyline 37 comes as a flagpole too — same height, same physics, with the flag hardware that keeps the peace with the neighbors.
The Build // 37 Feet, Two Pieces
Base: 28-foot DX Vertical, 160-6M, no radials, the tallest open vertical in the Greyline line.
Top: 9-foot DX Whip, installs in about two minutes, no tools, field-upgradeable any time.
Total height: 37 feet of aperture into the sky.
Best bands: 17M (about +4.0 dBi) and 20M (about +2.9 dBi), W7SX NEC; every band 40 through 17 ahead of a full-radial quarter-wave. Multi-lobe behavior 15M and up, described above.
FT8 / digital: Full duty cycle at rated power — a solid radiator with no traps or loading coils to heat.
Configurations: Open DX Vertical (taller, no flag) or Flagpole (HOA-friendly, flies a flag).
Add The Height, Work The Band
No tuner trick replaces aperture. Thirty-seven feet of it, modeled and stated with its reference, peaking on 17 meters, with the low bands underneath and the high bands there when you want to chase them. This is the most antenna Greyline builds.
The masters teach the physics. Greyline ships the height. Now go work the bands!
Build Your Skyline 37
Open DX Vertical (taller, no flag) — 28' DXV plus the 9' DX Whip, shipped as one system.
Flagpole (HOA-friendly) — 28' DX Flagpole plus the 9' DX Whip, with the flag hardware.
Current pricing on each configuration is shown at the top of this page and on the Skyline Series page. Shipping now: same or next business day.
The Skyline Ladder + Keep Reading
The Skyline 33 and Skyline 29 — the same idea at 33 and 29 feet, both peaking on 17 meters at about +3.5 dBi, for lots that want a shorter pole and a higher wind rating.
The Tilt-Up Base — at 37 feet this is what keeps the antenna a one-person job. $25 off with any antenna.
Assembled Coax & Hardline — genuine Times Microwave and Heliax, 10% off with any antenna.
What Height Should I Buy? — where every Greyline height peaks, on one page.
The Antenna Selection Guide — tell it your bands, it finds your height.
