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1. [TowerTalk] lp V stepIR (score: 1): Author: "anthony" <k2vi@cox.net>; Date: Sat, 23 Jan 2010 09:45:00 -0500; 3 element stepir and the t8 will radiate almost the same signal strength at the other end.More to fail with the stepir and did you see how much they cost??? WOW. big bucks. I would put up the t-8 and; /archives//html/Towertalk/2010-01/msg00561.html (6,966 bytes)
2. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 23 Jan 2010 14:02:36 -0500; Both modeling and theory strongly disagree with this ... The active portion of an 8 element 13-32 MHz LP on an 180 foot boom is a small portion of the total boom length. Here are model data of an 8; /archives//html/Towertalk/2010-01/msg00584.html (10,736 bytes)
3. Re: [TowerTalk] lp V stepIR (score: 1): Author: Scott McClements <kc2pih@gmail.com>; Date: Sat, 23 Jan 2010 14:29:06 -0500; I also put together a 18 foot boom/ 8 element NEC4 model using the ARRL LPCAD program. My gain figure for the LPDA were a little higher (5.5dBi), but I agree with what is shown here. Also note, its n; /archives//html/Towertalk/2010-01/msg00588.html (13,646 bytes)
4. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Steve, W3AHL" <w3ahl@att.net>; Date: Sat, 23 Jan 2010 15:26:51 -0500; Your model of the 8-element LPDA was apparently done from a formula and wasn't optimized at all. Although I do agree that 6 & 8 element logs are sub-optimum. But an optimized design for a 9 element 1; /archives//html/Towertalk/2010-01/msg00595.html (10,311 bytes)
5. Re: [TowerTalk] lp V stepIR (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sat, 23 Jan 2010 12:46:59 -0800; So.. if we talk about 14-30 MHz 18-20 ft boom -> 5.5 dBi 36 ft boom -> 7.5 dBi 52 ft boom -> 8.6 dBi Assuming a symmetric pattern in E and H plane (yes, I know that's not actually the case, but we ca; /archives//html/Towertalk/2010-01/msg00597.html (8,784 bytes)
6. Re: [TowerTalk] lp V stepIR (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sat, 23 Jan 2010 13:14:47 -0800; Is that gain in free space, or over some assumed ground at some assumed height? _______________________________________________ _______________________________________________ TowerTalk mailing list; /archives//html/Towertalk/2010-01/msg00598.html (8,465 bytes)
7. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Steve, W3AHL" <w3ahl@att.net>; Date: Sat, 23 Jan 2010 17:11:20 -0500; Jim, As it said -- it's free space gain. It's the same antenna I sent you the direct reply about earlier. This antenna design is still being tweaked and is an example of optimizing it for the higher; /archives//html/Towertalk/2010-01/msg00602.html (10,079 bytes)
8. Re: [TowerTalk] lp V stepIR (score: 1): Author: Scott McClements <kc2pih@gmail.com>; Date: Sat, 23 Jan 2010 17:56:08 -0500; So you are lengthening the boom length to 20 feet. I thought the discussion was comparing a Tennadyne T8 to a 3 element Steppir. Does the Tennadyne T8 use a parasitic director for 10 meters? Sure, if; /archives//html/Towertalk/2010-01/msg00603.html (9,108 bytes)
9. Re: [TowerTalk] lp V stepIR (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sat, 23 Jan 2010 15:04:07 -0800; you're right.. I missed that. Tnx _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesti; /archives//html/Towertalk/2010-01/msg00605.html (8,040 bytes)
10. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 23 Jan 2010 19:15:34 -0500; Except when we get to 36 foot booms a yagi is capable of 10 dBi on 20 meters (4 element) and 11.5-12 dBi on 10 meters (6 elements). Not to bang the SteppIR drum too loudly but the 4 element antenna; /archives//html/Towertalk/2010-01/msg00610.html (17,073 bytes)
11. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 23 Jan 2010 19:25:38 -0500; Absolutely correct. However, it was compared element length and spacing data for both the Cushcraft ASL-2010 and the then current Tennadyne T8. The Cushcraft and Tennadyne designs each had only mino; /archives//html/Towertalk/2010-01/msg00611.html (13,808 bytes)
12. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Gene Fuller" <w2lu@rochester.rr.com>; Date: Sat, 23 Jan 2010 19:36:59 -0500; Another side thought on LP's - Obviously not a consideration v the SteppIR, but the LP is pretty straight forward for ththe DYI guy who wants to build his own. Somewhat of a carryover from before the; /archives//html/Towertalk/2010-01/msg00612.html (16,981 bytes)
13. Re: [TowerTalk] lp V stepIR (score: 1): Author: Scott McClements <kc2pih@gmail.com>; Date: Sat, 23 Jan 2010 20:12:24 -0500; This is true, but the cool thing about the LPDA is the gain *and* F/R go up. My point about the 36 foot long boom is that you truly have the gain of a 3 element yagi over the entire frequency range a; /archives//html/Towertalk/2010-01/msg00614.html (10,342 bytes)
14. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Steve, W3AHL" <w3ahl@att.net>; Date: Sat, 23 Jan 2010 21:06:19 -0500; Gene, Once you go beyond 13 elements or so, a "formula" LPDA isn't too bad. But the 8-10 element versions definitely benefit from optimization to improve gain, F/B ratio and SWR in the ham bands. The; /archives//html/Towertalk/2010-01/msg00619.html (11,726 bytes)
15. Re: [TowerTalk] lp V stepIR (score: 1): Author: Neil & Heather <neil.goodell@myfairpoint.net>; Date: Sat, 23 Jan 2010 21:45:18 -0500; First off...thanks to all for some great posts this weekend....some real "meat & potatoes" discussion.....and timing is great...as I am in the process of selecting an antenna for the tower... and was; /archives//html/Towertalk/2010-01/msg00625.html (9,480 bytes)
16. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Jim Chaggaris" <jimc@pwrone.com>; Date: Sat, 23 Jan 2010 21:21:52 -0600; The Bencher doesn't cover the WARC bands. 73, Jim N9WW James Chaggaris President PowerOne Corp./PowerOne Environmental 1020 Cedar Avenue Suite 203 St. Charles, IL 60174 Phn: (630) 443-6500 Fax: (630); /archives//html/Towertalk/2010-01/msg00626.html (10,980 bytes)
17. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Steve, W3AHL" <w3ahl@att.net>; Date: Sat, 23 Jan 2010 22:56:14 -0500; Just be fair, for the opinions of mostly-happy Tennadyne T-8 users, you might want to visit: http://groups.yahoo.com/group/TennadyneAntennas/ Their Files section has some useful info. The T-8 works -; /archives//html/Towertalk/2010-01/msg00628.html (11,037 bytes)
18. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Gene Fuller" <w2lu@rochester.rr.com>; Date: Sat, 23 Jan 2010 23:36:42 -0500; Hi Steve - I'm replying just to you because much of the gang may be tired of reading this thread. I'm glad to hear you're thinking/planing to do an LP before long. I'm sure you'll be happy with it. A; /archives//html/Towertalk/2010-01/msg00631.html (16,120 bytes)
19. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Gene Fuller" <w2lu@rochester.rr.com>; Date: Sat, 23 Jan 2010 23:52:48 -0500; or TH-11 ? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Towertalk/2010-01/msg00633.html (10,519 bytes)
20. Re: [TowerTalk] lp V stepIR (score: 1): Author: "Gene Smar" <ersmar@verizon.net>; Date: Sun, 24 Jan 2010 00:09:00 -0500; Jim et al: Although the Bencher Skyhawk isn't resonant on 17 or 24 M it does load on those bands with a tuner. I have worked a fair share of folks on both bands with mine. However, I believe the dire; /archives//html/Towertalk/2010-01/msg00635.html (13,075 bytes)

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