A Question for the Antenna Gurus

I worked a few guy's now here, 10 15 meter, east coast USA too with 100 watts.
If it was too easy, what would be the fun?

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Hey Ron...looks like that perfect antenna building weather is on its way!

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Originally Posted by ki4itv

Hey Ron...looks like that perfect antenna building weather is on its way!

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Just started raining here.

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Originally Posted by ab1ga

It has been done, although not within the relatively tight confines of a flagpole.

"WA5ABR's Homebrew Seven-Band Vertical", in "Simple and Fun Antennas for Hams", First Edition, ARRL. This book may no longer be in print, but I think it was replaced by another title within the past two years, and the article may be in there.

The article also appeared in the ARRL Antenna Compendium, Volume 5.

The antenna covers from 10 to 40 meters, and looks to be about 23 feet tall, with the 40 meter radiator being 16' of tubing, a loading coil, and a whip. It's made of telescoping tubing using 15-inch diameter acrylic disks as spacers.

Just brainstorming here: Use aluminum tubing as the 40 meter element right down the middle of the interior of the flagpole. Put the loading coil right at the top, drill a small hole in the top for the whip portion to attach through. Attach acylic spacer disks to that center element at intervals, maintaining as snug a fit as practical. Use bare wire, or perhaps brazing rod for rigidity. Rigid small-diameter copper tubing would also work, but might be pricey. Assemble the unit, do preliminary tuning outside the pole, then slide it in from the bottom.

You may have the books on your shelf, but if not, send me a PM with email address and I'll send you a copy of the article. No guarantees, either about the quality of the scans or the performance of the antenna, though. :)

73,

Actually, I found a vendor at the WACOM hamfest who's selling a 31 foot fiberglass antenna that could double, in a stealth environment, as a flag pole. If I didn't already have everything I need...

It's called the Eagle One Vertical Antenna from S&G Engineering in Proctorville OH. The ham behind it is W8AFX. I was trying to get him to come to WASHFest, we shall see...

And, well, I don't think I have the first edition, but I have a lot of ARRL antenna books on the shelf. I'll go take a look through them...

Quote:

Originally Posted by ki4itv

Hey Ron...looks like that perfect antenna building weather is on its way!

Attachment 5103

Yeah, but I have to build the deck first. And it looks like my surface sealant may have sprung a leak, we have moisture under the porch again...