Greyline DX Flagpole How-to’s: Mounting, ground, boat, bulkhead, roof top, towers.

Greyline DX Vertical Antennas Tips and How-to’s: Mounting, ground, bulkhead, roof tops, tower.

Customer Review: "Highly Recommended all band radio antenna system for HOA and restricted Ham Radio QTH's."
Includes Summer 2019 update below.
Greetings Radio Ops and friends. We did it again. In the name of "science" and to keep our Radio-active spirit alive here's our continuing effort to bring you more transparent references for your entertainment and consideration. Recently we had a question we thought was worth sharing...

How does the 20' Flagpole Antenna, OCF Vertical-Dipole play at varying mounting heights and locations?

We receive questions such as "can I mount this on my roof?" or "can I mount this on my bulkhead?"

As a simple visual reference, the below performance plots should help serve your thinking by illustrating the various installation or mounting heights one might consider for the 20-foot OCF DX Flagpole mounted and compared to itself at:
1 ft. (ground level) - red
10 ft. (house eave height) - blue
25 ft. (house peak height) - green
50 ft. (tower top height) - orange

Update Summer 2019: Boat Docks and Lake Cabins

Lake Docks:
Usually, wide open spaces in certain directions, if not all. A wonderful bonus for the vertical dipole owner.

Many customers are putting their verticals on boat docks at their lake homes across the country. Remember, radials are not needed with a vertical dipole (DX Flagpole Antenna & DXV) to work properly. Do you recall "grounding" your dipole in a tree? Nope.

That said if you would like to improve your take-off ground, as lakes are typically not salt-water, and likely these radials will be elevated on a dock, you could try 4-16 elevated radials, ~6 inches above the lake should do it. Please do not connect these electrically to the Antenna system, as this system floats. The radials will work passively. 

The lake houses have a tremendously wide open space to work with for signal take-off and this is always helpful in a major way.

Do you want to try radials, but not on a dock? Okay, consider elevating 4-16 radials a 3 to 6-inches above the ground. If you can not elevate the radials, consider 130 radials on the ground. You really do need 100+ to make a real difference. Or simply leave the radial topic aside as you do not need them with the OCF vertical dipole, aka DX Flagpole Antenna and DXV by Greyline Performance.

Ocean Front, Bulkheads and Salt Water Docks:
You are the luckiest of the bunch when it comes to vertical dipole antenna mounting locations. The only place that can beat you is on a sailboat with 360-degree wide-open spaces! Work with what we have, right? 

You have the wide-open spaces, typically, and your ground screen as many call it is simply perfection. It is arguable but experience tells the true tale that often times in your position even the big Yagi-guys just inland from you won't hear what you are working at some point in time. It can be that good.

*reminds me of N2NL working KL2A/9K2 on 80M. NL was using a simple vertical on his dock and no one could touch his signal several hours each morning for about a week! I was using an 80M Yagi.
Again, you do not need radials with the Greyline Performance DXV or DXF (DX Flagpole Antennas) on salt-water. I don't think 200-radials would show much increase at all. Anyone care to comment?

How will you mount your OCF DX Vertical-Dipole or DX Flagpole? Leave us a comment below.

73 Greyline Performance
RF Research Group
Home of the DX Flagpole


  • hi just wondering if you can do the plot with the 28 & 24 foot flagpole at those different heights , just wondering if it is worth the extra money for the taller one, or the 20 foot will be just fine, i will be putting mine on the roof at 20FT. thank you

  • Why am I not finding any user reviews or video’s on the flagpole antenna? I’m very interested as I am restricted by HOA rules and have been off the air for the past ten years because of it. Maybe you could make a video of the antenna being assembled, installed and in use?


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