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Total 8 documents matching your query.

1. [TowerTalk] CushCraft Query (score: 1): Author: "Barry Fox" <foxbw@comcast.net>; Date: Wed, 21 Jun 2006 20:57:06 -0500; I need the opinion of the yagi modeling gurus on the site. I bought a CC D4, 40 - 10M rotary dipole. I have since decided to purchase an A3S. I notice there is a modification kit to add 40M to the A3; /archives//html/Towertalk/2006-06/msg00504.html (7,594 bytes)
2. Re: [TowerTalk] CushCraft Query (score: 1): Author: "Clay Curtiss W7CE" <w7ce@curtiss.net>; Date: Thu, 22 Jun 2006 07:06:31 -0700; Chances are the impedance match will be poor if you try to use the D4 as the DE on your A3S. The D4 is designed to give an impedance of ~50 ohms with no parasitic elements. Add a reflector and direc; /archives//html/Towertalk/2006-06/msg00508.html (8,026 bytes)
3. Re: [TowerTalk] CushCraft Query (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Thu, 22 Jun 2006 10:33:23 -0400; Barry, Download the A3, D4 and A743 (40/30 meter kit) manuals from the CushCraft web site and compare them. You should be able to use the parts from the D4 as an A743. The 10 and 20 meter traps are i; /archives//html/Towertalk/2006-06/msg00509.html (9,408 bytes)
4. Re: [TowerTalk] CushCraft Query (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Thu, 22 Jun 2006 10:03:49 -0700; Not only will the impedance be different, but I'll bet the pattern would be substantially different. The whole design of a Yagi depends on the mutual coupling among the elements to get the current ph; /archives//html/Towertalk/2006-06/msg00514.html (8,676 bytes)
5. Re: [TowerTalk] CushCraft Query (score: 1): Author: Kent Tiburski <k6fq@sbcglobal.net>; Date: Thu, 22 Jun 2006 10:16:35 -0700 (PDT); Changing the DE might give a different feed impedance, but as far as the it changing the pattern , etc., it will still be the same. If it fits, and can be tuned, you shouldn't notice a difference in; /archives//html/Towertalk/2006-06/msg00516.html (9,842 bytes)
6. Re: [TowerTalk] CushCraft Query (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Thu, 22 Jun 2006 11:04:06 -0700; I haven't actually tried it, and a well designed experiment beats pages of theory, but theory says that changing the impedance of any element changes the relative currents in the elements which chang; /archives//html/Towertalk/2006-06/msg00519.html (8,505 bytes)
7. [TowerTalk] CushCraft Query (score: 1): Author: <john@kk9a.com>; Date: Thu, 22 Jun 2006 16:14:23 -0400; Why would the impedance change with a different driven element. The reflector and director lengths and spacing are not being changed and I thought that is what sets the impedance. If I remember corre; /archives//html/Towertalk/2006-06/msg00525.html (9,105 bytes)
8. Re: [TowerTalk] CushCraft Query (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Thu, 22 Jun 2006 16:08:39 -0700; I don't know that it would. Another poster said that the D9 is designed for a different Z than the A3's normal driven element (which seems reasonable). I would expect, for instance, that the traps mi; /archives//html/Towertalk/2006-06/msg00530.html (10,849 bytes)

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