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1. [TowerTalk] optimum height (score: 1): Author: aa4lr@arrl.net (Bill Coleman); Date: Tue, 7 Aug 2001 16:04:09 -0400; I'm sorry, I hate to quibble with the experts, but this doesn't seem reasonable. If I stack two A3S antennas, with a 14 foot boom, that's 3.7 feet? That seems unreasonably close. Or did he mean 3.7*1; /archives//html/Towertalk/2001-08/msg00155.html (7,983 bytes)
2. [TowerTalk] optimum height (score: 1): Author: alsopb@gloryroad.net (alsopb); Date: Tue, 07 Aug 2001 23:09:29 +0000; Bill, As the original post said, the measurements were in wavelengths. So you have to first convert your boom length to wavelengths. Take the square root of that and then convert back to feet. It is; /archives//html/Towertalk/2001-08/msg00165.html (9,429 bytes)
3. Fw: [TowerTalk] optimum height (score: 1): Author: kk9a@arrl.net (kk9a@arrl.net); Date: Tue, 7 Aug 2001 20:37:35 -0500; The formula given was in wavelengths so that would give you a spacing of 20 - 30 feet depending on frequency. I'd go with the 30 foot spacing. John I'm sorry, I hate to quibble with the experts, but; /archives//html/Towertalk/2001-08/msg00171.html (8,814 bytes)
4. [TowerTalk] optimum height (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 07 Aug 2001 22:43:44 -0400; ... I did some modeling to try to determine the best compromise spacing, using the "scoring" technique I outlined in NCJ for January-February 2001. The bottom line is that different stacking distance; /archives//html/Towertalk/2001-08/msg00175.html (8,387 bytes)
5. [TowerTalk] optimum height (score: 1): Author: alsopb@gloryroad.net (alsopb); Date: Sat, 28 Jul 2001 13:15:03 +0000; I queries WX0B about the rule of thumb regarding "optimum" stacking height. Here was his response: ** For HF antennas over ground, W2PV did the math correctly and the formula is SQ rt of boom length; /archives//html/Towertalk/2001-07/msg00602.html (8,286 bytes)
6. [TowerTalk] optimum height (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 28 Jul 2001 11:44:30 -0400; Hi Brian, I don't understand what the following means. Is something wrong? My 40 meter yagi has a 47 foot boom. Optimum stacking distance for gain is ~90 feet, depending on array mean height. Using t; /archives//html/Towertalk/2001-07/msg00605.html (8,151 bytes)
7. [TowerTalk] optimum height (score: 1): Author: alsopb@gloryroad.net (alsopb); Date: Sat, 28 Jul 2001 16:18:19 +0000; As stated originally the boom length in the formula is in wavelengths. A 47' boom is about .7 wavelength on 40 meters. The formula predicts a spacing of .84 wavelenth or about 56 feet. 73 -- FAQ on W; /archives//html/Towertalk/2001-07/msg00608.html (8,574 bytes)
8. [TowerTalk] optimum height (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Sat, 28 Jul 2001 13:22:16 -0400; I think it's fairly well understood that stack spacing for HF (with real ground a couple of wavelengths below the stack) is quite a different matter than VHF/UHF. What intrigues me are the "sweet spo; /archives//html/Towertalk/2001-07/msg00613.html (8,290 bytes)
9. [TowerTalk] optimum height (score: 1): Author: n4kg@juno.com (n4kg@juno.com); Date: Sat, 28 Jul 2001 12:45:35 -0600; A FULL Wavelength on 40M is 140 ft. A HALF WAVE Dipole is 66 ft allowing ~5% for end effects. A 47 ft boom is .335 WL. The square root is .58 sq rt WL (whatever the **? those units represent). If we; /archives//html/Towertalk/2001-07/msg00616.html (9,949 bytes)
10. [TowerTalk] optimum height (score: 1): Author: alsopb@gloryroad.net (alsopb); Date: Sat, 28 Jul 2001 18:32:41 +0000; OOps. Thinking of a 67 foot dipole in the math. Of course the wavelenth should be about 140'. (the product of approx 3'/M X 40M much greater than 67' DUH!) 73 de Brian/K3KO -- FAQ on WWW: http://www.; /archives//html/Towertalk/2001-07/msg00617.html (11,010 bytes)
11. [TowerTalk] optimum height (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 28 Jul 2001 19:10:20 -0400; Hi Tom, But that's true even when the booms are only 5 feet long with two elements, or if they are 50 feet long with three elements! As a matter of fact, it is true if they are dipoles with no boom a; /archives//html/Towertalk/2001-07/msg00618.html (8,222 bytes)

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