What about a (folded) unipole with an ATU? See pp. 7-47f. of the ARRL's
_Hints and Kinks_ (15th. ed.). That's what I'm planning to try when I
get my tower up.
Alan AB2OS
On 10/02/03 09:32 pm Lee Buller put fingers to keyboard and launched the
following message into cyberspace:
Ladies and Gents....
This summer, I lost the far leg support of my 160 meter Inverted-L. The 75 foot elm tree did not survive a 90 mph micro-gust (the tower did) and it broke in half. I have to cut the rest of it down.
That leaves me with a problem. I have other place to hang the horizontal leg of the 160 meter Inverted-L. So, what do I do? I have a 60 foot tower with a TH6DXX on the top, but my track record of shunt feeding the tower is not all that great. Yes, I have a pretty good ground under it...not great...but OK. I've used a lot of different variable caps on the shunt but tuning it has been 2:1 at best.
How about a trapped dipole? I can get a 80 meter inverted-vee on the lot. So, I was wondering if a trapped system would work and how well? I would think that the band width of such a device would be small, but so it s a shunt fed tower. as well as the Inverted-L.
So, anyone have some great ideas?
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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