Which Greyline antenna has the highest wind rating?

Among standard models, the 12-foot is rated to 155 mph with the flag lowered (ASCE 7-10). In the heavy-duty HD Series, the 24-foot HD is about 107 mph and the 28-foot HD over 90 mph in preliminary engineering estimates, with PE-certified ratings to follow.

Why is a flagpole antenna rated lower with the flag flying?

The flag is the largest wind load on a flagpole, so the rating is lower while it flies. The U.S. Flag Code calls for lowering the flag in severe weather; with the flag down the pole is rated like the bare pole.

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Q: How do I find the wind speed my antenna needs to handle?

Look up your local design wind speed on the ATC Hazards by Location map. Coastlines, ridgelines and open ground run higher, which is what the heavy-duty HD Series is built for.

What Wind Does Your Antenna Need to Handle?

Pick flagpole or vertical, then a wind speed. You will see every Greyline rated for it, tallest first. Every one works every band, 160 through 6, from one feedpoint, with no radials.

1. Which kind?

2. Rate it with the flag…

3. At least this much wind:

Standard ratings are calculated to ASCE 7-10. *Heavy-duty (HD) figures are preliminary engineering estimates; PE-certified ratings will be published when complete. Skyline ratings with the 9' whip on the standard base are not yet published.

Why the flag matters

The flag is the largest wind load on a flagpole, so the rating is lower while it flies. The U.S. Flag Code calls for lowering it in severe weather; with the flag down, the pole is rated like the bare pole.

What wind do I need?

Your local design wind speed is on the ATC Hazards by Location map. Coastlines, ridgelines and open ground run higher; that is what the HD Series is built for.

Walk it down

Add a Tilt-Up Base and one person can lower the antenna ahead of a big storm and raise it after. Questions about your site? Call 435-200-4902.

Ham Radio is fun again. Pass it on... 73, Jon KL2A & the Greyline Performance Team

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Essential for every antenna

This turns all antenna work into easy one-man jobs. It also makes storm prep easy - just drop the antenna for the storm, raise it later. It takes less than 5 minutes to go up or down. I can't imagine having an antenna without one. I'm old enough that climbing towers, trees or big ladders just isn't in the playbook any longer, so this is a life-saver for my hobby. Buy one and make your life easier and add years to your ability to work on your antenna. Five Stars!!

Thank you, Rob. “Essential” is exactly the word we hoped for. One tip from another owner: walk it down once a season on a calm day and check the hardware at chest height. Fun season ahead! 73, Jon KL2A

Should be part of every antenna

The tilt base makes it possible to raise and lower the antenna in minutes single-handed with complete safety. The design is simple and robust and I love the fact that it can't over-shoot when raising it. In fact, it is seriously over-built. The only help I needed to install it was lowering the antenna to add the unit. It does raise the halyard cleat but I simply removed it, left the bolts in the original holes and mounted it at a comfortable level with a stainless hose clamp, problem solved. No more worries about the antenna during storms here in Florida. Five minutes and it's on the ground out of the wind.

Great addition to My 20V!

After 2 weeks of use I can safely say that the 9' whip is a great addition to my 20V! My rough calculations show about a 2+ db improvement overall. On the receive side the most dramatic indicator is that I am getting approximately the same signal strength without the preamp on most bands. I am also getting more reports in the + range on FT8 than previously. I have used PSK reporter to get a general picture of my RF footprint and signal strength compared to to the original 20v w/ previous reports. I have also been able to work several new countries that I could not work previously...India, Franz Joseph Land, Kahazakistan. India is certainly not rare but it has taken me three years to eliminate my "blind spot". Swr is well below 1.3/1 on all bands 80m-6m using the LDG RT-100 at the antenna. All in all could not be more pleased with the 9" whip addition!

Franz Josef Land and Kazakhstan on nine more feet — that's the report every whip page wishes it had. Thank you, Craig. Your words are on the page now. 73, Jon KL2A

Better base.

I want a 6ft x 18in hole. That is what the backhoe bucket is going to dig. I will need my own base tube, and a whole lotta concrete! I bought this extender to allow a more accurate vertical alignment while dumping in the concrete.

A 6-foot hole will hold anything we build. One tip while the concrete goes in: check plumb from two directions, 90° apart, then leave it alone for 24 hours. Send us a photo when it’s up! 73, Jon KL2A

Product is good. But I need a quick instruction sheet. You remove the bottom tube and replace it with the antenna base. Then the tube you removed connects the the top of the arm and to the insulated base of the antenna. Now I can lower my 24’ antenna without help.

Thank you, Dale. You were right, so we made one: the one-page Tilt-Up Base Instructions (install, lower, raise) now sit on the product page, because of your review. Have the best season yet! 73, Jon KL2A

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What Wind Does Your Antenna Need to Handle?

Let customers speak for us