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Author Topic: Tower Antenna  (Read 402 times)
W8RID
Member

Posts: 45




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« on: March 22, 2008, 12:48:12 PM »

Will be putting up a 40' Tower in the near future.

Put a post in earlier about a Cubical Quad antenna for this tower and you guys gave me plenty to look at. THANKS

The question this time is:

The Band coverage I'm looking for is 10, 15, 20, 40, 80.

I know the 80 is going to be pushing it.(I can live without that if i have to)

Is there a Cubical Quad or Yagi beam that would cover at least the first 4 bands??

I would love to hear your input and how you think tey perform.

Thanks

Bob
W8RID
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AA4PB
Member

Posts: 12770




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« Reply #1 on: March 22, 2008, 01:56:58 PM »

Many of the 10/15/20M yagis (Cushcraft A3 for example) have a 40M add-on kit that turns the driven element into a 40M dipole. The other elements don't come into play on 40M.

Use the tower to support the center of an inverted-V wire dipole for 80M. Other 40M options are a second inverted-V or 40M traps in the 80M inverted-V.
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AB3CX
Member

Posts: 622




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« Reply #2 on: March 22, 2008, 05:39:39 PM »

Force 12 makes a yagi for 40-20-15-10, on a relatively short boom. Combines 2 elements for 40 with one of their smaller tribanders. Optibeam is the real deal here, however, with a series of yagi antennas that cover 40 plus 20-10 including the WARC bands. They are large and expensive, but use a single feedline.  I wish I had an Optibeam!!
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W4KVW
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Posts: 482




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« Reply #3 on: March 22, 2008, 06:20:18 PM »

Mosley TA-53M with the 40 meter kit covers 10,12,15,17,20,as well as 40 meters for about $1000 or so total on a 14 ft. boom.I do NOT know of any Quads with that many bands of coverage but it may be possible.80 meter beam would be VERY LARGE but they can be had for lots of $$$$$$$$$$$$$$$$$$.

Clayton
W4KVW
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KB9CRY
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Posts: 4284


WWW

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« Reply #4 on: March 22, 2008, 06:48:49 PM »

SteppIR
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K2MK
Member

Posts: 391




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« Reply #5 on: March 23, 2008, 06:00:40 AM »

I had a Hy-Gain Explorer 14 tri-bander on a US Tower 41 foot crank up at my previous home. I purchased it with the 40 meter add on kit that makes the driven element a trapped dipole on 40. It worked great, I miss it. And an inverted vee on 80.

The tower was nice too, it collapsed to about 12 feet so that I could work on the beam with a tall step ladder.

Of course that was when Hy-Gain was Hy-Gain. I never had any problems with the antenna over the 16 years it was in the air. I don't know if their quality is still as good.

Now having the WARC bands at my new QTH, I would never want to lose them. They are a lot of fun with lots of DX. A SteppIR yagi can give you 40 through 6 meters inclusive.
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N3QE
Member

Posts: 2140




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« Reply #6 on: March 24, 2008, 01:46:46 PM »

Do the math - 40 feet is nearly the same as a quarter wavelength on 40M. Use it as a full-height vertical on 40, and switch in a loading coil to use it on 80.
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