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Total 5 documents matching your query.

1. Topband: Trees And RF - Suggested Test (score: 1): Author: "Ward Silver" <hwardsil@gmail.com>; Date: Tue, 3 Nov 2009 08:36:25 -0800; I suggest the following tests to be done by someone else than me...any of which could give us some anecdotal evidence about trees and RF, at least. Wind a several-turn solenoidal coil with a diameter; /archives//html/Topband/2009-11/msg00053.html (7,643 bytes)
2. Re: Topband: Trees And RF - Suggested Test (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Tue, 03 Nov 2009 15:28:22 -0500; I remember reading, somewhere on the net, a US Army contractor paper on the subject of using trees as radiators, by using such a solenoid to couple RF to the trunk. IIRC this was for special ops in t; /archives//html/Topband/2009-11/msg00065.html (9,235 bytes)
3. Re: Topband: Trees And RF - Suggested Test (score: 1): Author: Herb Schoenbohm <herbs@vitelcom.net>; Date: Tue, 03 Nov 2009 16:50:00 -0400; To heck with the tests! If I had a 120 foot tall tree in my backyard I would hang a 3 or 4 wire cage around it from top to bottom. The tree would not bother you much but the cage sure would do its jo; /archives//html/Topband/2009-11/msg00067.html (7,644 bytes)
4. Re: Topband: Trees And RF - Suggested Test (score: 1): Author: "Edward Swynar" <gswynar@durham.net>; Date: Tue, 3 Nov 2009 16:13:56 -0500; "...To heck with the tests! If I had a 120 foot tall tree in my backyard I would hang a 3 or 4 wire cage around it from top to bottom. The tree would not bother you much but the cage sure would do it; /archives//html/Topband/2009-11/msg00069.html (8,765 bytes)
5. Re: Topband: Trees And RF - Suggested Test (score: 1): Author: "Kenneth D. Grimm, K4XL" <grimm@sbc.edu>; Date: Tue, 03 Nov 2009 16:59:28 -0500; Yes. :-) A metal tower firmly imbedded in the ground makes a great antenna fed with a gamma or omega match, or used as part of a folded umbrella (folded unipole). Go for it! 73, -- Ken K4XL k4xl@arrl; /archives//html/Topband/2009-11/msg00073.html (9,234 bytes)

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