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21. [Towertalk] 20M Yagi ? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Tue, 16 Jul 2002 20:11:48 +0100; I forgot to mention another thing about TA which some may be wondering about. It provides the statistical data on takeoff angles by frequency for different paths between major population areas. N6BV; /archives//html/Towertalk/2002-07/msg00444.html (8,471 bytes)
22. [Towertalk] Dipole setback on a cliff (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 17 Jul 2002 03:05:00 +0100; close to the edge of a ~500' mesa. Looking in the direction of the 500' dropoff, what is the effective height of this antenna? Is it 40' or 500'? I'm not how YT would work for this but I think EZNEC; /archives//html/Towertalk/2002-07/msg00450.html (7,562 bytes)
23. [Towertalk] Phillystran Grips (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 31 Jul 2002 21:57:10 +0100; 3 Mini-Mule Wire Clamps (MP 189) 1/16-1/4" 1300# $30 3 Home Depot Tie-downs including ratchet ~2000# 15 Total $45 3 makes it very easy to plumb the tower as you go up and the above is plenty of overk; /archives//html/Towertalk/2002-07/msg00872.html (8,222 bytes)
24. [Towertalk] KLM Tribanders (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 31 Jul 2002 22:28:57 +0100; keep the + on the same side for the entire stack. Is this so, and if it is what is the reason for doing so? I know you can check the balun with the MFJ 259 to determine which side is which and plan t; /archives//html/Towertalk/2002-07/msg00873.html (8,591 bytes)
25. [Towertalk] Antenna Analyzer Suggestions? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Fri, 03 May 2002 20:00:58 +0100; AEA CIA-HF Autek Analyst MFJ 259B MFJ 269 I have the first 3 of these and they all have their strengths and weaknesses. It really depends what you are trying to do as to which is best. AEA CIA-HF: Th; /archives//html/Towertalk/2002-05/msg00082.html (9,975 bytes)
26. [Towertalk] Anyone ever make staggered monobanders (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Thu, 09 May 2002 20:05:53 +0100; Hi Jack! down to 48ft with good 10dbd gain on 10 thru 20 including WARC bands. If you got 10 dBd (i.e. 12.15 dBi free space gain) on 20 meters using a 48 ft boom you made a mistake. The best of these; /archives//html/Towertalk/2002-05/msg00257.html (7,010 bytes)
27. [CQ-Contest] Re: [Towertalk] More on Lightning protection (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Thu, 16 May 2002 14:34:41 +0100; I lived about 30 miles due East of John on the Eastern edge of the Rocky Mtn foothills. From 1980 until 1993, I had two towers which were the tallest structures for miles around (25G with a KT-34XA a; /archives//html/Towertalk/2002-05/msg00423.html (8,441 bytes)
28. [Towertalk] Terrain Analysis (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Fri, 17 May 2002 11:18:03 +0100; too. If you know someone who has any version of Topo USA, this is very easy to do. You first find your location, then select a point in the desired azimuth direction about 2 miles away, and it genera; /archives//html/Towertalk/2002-05/msg00438.html (7,650 bytes)
29. [Towertalk] EZNEC 3.0 question (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Sun, 19 May 2002 23:03:18 +0100; Steve, if you plan on doing anything with Yagi's, I would highly recommend K6STI's Yagi Optimizer (YO7) over EZNEC 3.0. I have both and YO7 is light-years ahead of EZNEC for modeling Yagi's. EZNEC is; /archives//html/Towertalk/2002-05/msg00492.html (8,174 bytes)
30. [Towertalk] EZNEC 3.0 question (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Mon, 20 May 2002 16:21:36 +0100; I belive the major improvement is a routine which uses global optimization. In previous versions, the optimizer would zero in on a local optimization which might not necessarily be the best. YO7 was; /archives//html/Towertalk/2002-05/msg00519.html (10,208 bytes)
31. [Towertalk] Yagi Optimizer 7.0 (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Mon, 20 May 2002 17:12:06 +0100; So as not to turn anyone off, YO 7.0 (non-Pro version) was $100 when I purchased it in the summmer of 2000. I would expect the non-Pro &O 7.5 is still in that range. I thought it was a steal for appr; /archives//html/Towertalk/2002-05/msg00522.html (6,845 bytes)
32. [Towertalk] Re: YO Pro 7.5, YO 7.0, etc Pricing (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Mon, 20 May 2002 22:33:51 +0100; Here's the "word" from the horse's mouth! BTW, I have always found Brian to be very prompt in replying to any inquiries and am happy to see that has not changed. 73, Bill W4ZV To: <towertalk@contesti; /archives//html/Towertalk/2002-05/msg00549.html (7,580 bytes)
33. [Towertalk] Rohn 25G rating (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 22 May 2002 11:27:01 +0100; to MPH and visa-versa? Look again...both a graph and table are on the back of the page with EIA Wind Loading Zones...at least it is in my ancient copy! 73, Bill W4ZV; /archives//html/Towertalk/2002-05/msg00604.html (7,412 bytes)
34. [Towertalk] Rohn 25G rating (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 22 May 2002 11:39:24 +0100; One more point for wind-loading which would not affect you but possibly others on the reflector. I belive the figures given assume sea level. If you are at a high altitude, you can derate the convers; /archives//html/Towertalk/2002-05/msg00605.html (7,935 bytes)
35. [Towertalk] Feedlines inside or out? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Wed, 29 May 2002 20:55:19 +0100; Another reason to run all lines inside towers is if you plan to shunt feed them on 80 or 160. This may also require grounding the hardline periodically so voltages do not develop between the coax and; /archives//html/Towertalk/2002-05/msg00782.html (8,018 bytes)
36. [Towertalk] ping-pong stacks (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Thu, 30 May 2002 03:05:17 +0100; phase reversals? i.e. 90, 60, 30...and what happens with vertical angle lobe steering? Here are two KLM 610's at 1 and 2 wavelengths. These are are old EZNEC models which are not as accurate as what; /archives//html/Towertalk/2002-05/msg00795.html (7,896 bytes)
37. [Towertalk] Bip Bop (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Thu, 30 May 2002 15:29:36 +0100; box that allows upper lower or both....now when I select both I want to simply add a length of feed line into one side of a pair of antennas to get my "both" to be out of phase, can I simply place a; /archives//html/Towertalk/2002-05/msg00815.html (7,052 bytes)
38. [TowerTalk] 10m-20m Antennas Above 150ft (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Fri, 01 Feb 2002 14:45:06 +0000; I've done better with relatively smaller (and lower) antennas on 10 meters than most of the multi-multi's: http://users.vnet.net/btippett/new_page_6.htm With 3 identical 6L KLM's at 35/70/105', the f; /archives//html/Towertalk/2002-02/msg00020.html (9,012 bytes)
39. [TowerTalk] Optimum Stacking Distance (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Fri, 03 Aug 2001 18:12:22 +0100; Hi All! Thought some of you might like to see the before and after results of optimizing my 10 meter KLM's using YO7: http://users.vnet.net/btippett/yagi_optimizer_7_0.htm It's my first effort at a W; /archives//html/Towertalk/2001-08/msg00039.html (7,439 bytes)
40. [TowerTalk] Optimum Stacking Distance (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Sat, 28 Jul 2001 13:17:29 +0100; KQ2M: "What happens if the elements are several feet in from the ends? Do we still use the boomlength as expressed in wavelengths, or do we use the actual length between the elements?" Hi Bob et al!; /archives//html/Towertalk/2001-07/msg00603.html (10,278 bytes)

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