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21. Re: [TowerTalk] Welding rebar cages (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 7 Jul 2006 09:57:55 -0700 (PDT); One word on welding of rebar cages instead of tying together with tywire, DON'T. It used to be somewhat popular to weld some portions of rebar installations industrially about thirty years ago, but t; /archives//html/Towertalk/2006-07/msg00204.html (7,294 bytes)
22. [TowerTalk] Fwd: Re: NASA lightning protection (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 7 Jul 2006 19:27:25 -0700 (PDT); Note: forwarded message attached. -- Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates starting at 1¢/min. _______________________________________________ ______________; /archives//html/Towertalk/2006-07/msg00220.html (7,167 bytes)
23. [TowerTalk] R.E. NASA shuttle lightning protection vs towerprotection (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 7 Jul 2006 22:09:07 -0700 (PDT); O.K. Here is link to an interesting photo;http://www.lightningsafety.noaa.gov/photos.htm Last photo on right side. You can see the mast that supports the lightning protection wire and how it is avoid; /archives//html/Towertalk/2006-07/msg00226.html (8,882 bytes)
24. [TowerTalk] Lightning damage pics (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 7 Jul 2006 22:44:39 -0700 (PDT); http://www.srh.noaa.gov/lch/severe/lsuagltg.php The above link will show a little of what lightning can do. It was not determined if this was a negative or positive pulse. Also note that the lightnin; /archives//html/Towertalk/2006-07/msg00227.html (6,980 bytes)
25. Re: [TowerTalk] grounging conductors and rod connections (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Sun, 9 Jul 2006 13:13:22 -0700 (PDT); There has been a lot of talk about stranded conductors. You have trouble getting stranded much larger than AWG#2 cu from most wholesale houses. Larger would bee a bear to bend and work with. For grou; /archives//html/Towertalk/2006-07/msg00286.html (9,195 bytes)
26. [TowerTalk] Cadweld (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Sun, 9 Jul 2006 13:54:52 -0700 (PDT); A Cadewld is composed of aluminum powder copper and a fluxing material. When fired it makes a alloy of the surface of the steel rod and the copper in the shot. All the copper wire, copper plating, an; /archives//html/Towertalk/2006-07/msg00289.html (6,966 bytes)
27. Re: [TowerTalk] stranded cu wire (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Sun, 9 Jul 2006 22:18:46 -0700 (PDT); I must apologize to all on the stranded issue. I miss typed and it should have read that solid non stranded wire is hard to find in larger sizes than AWG #2 cu. I've never seen tinned 00 and larger a; /archives//html/Towertalk/2006-07/msg00300.html (7,946 bytes)
28. [TowerTalk] conduit (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Tue, 11 Jul 2006 14:31:47 -0700 (PDT); I have mentioned the conduit and its ability to choke current in grounds(which you don't want to happen ) and coax etc. (which you do want). Others have reminded that the outer braid/corrugated jacke; /archives//html/Towertalk/2006-07/msg00362.html (8,707 bytes)
29. [TowerTalk] Inverted L on three low bands (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Wed, 12 Jul 2006 22:14:44 -0700 (PDT); Assuming you have at least a quarter wavelength of wire vertical on 40 mtrs.you need to have separate radiators or at least stubs for each band to have a easy to feed antenna on three bands as 40, 80; /archives//html/Towertalk/2006-07/msg00436.html (7,942 bytes)
30. [TowerTalk] Copper pipeing (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Wed, 12 Jul 2006 23:24:35 -0700 (PDT); If you are finding pinholes in the copper piping near or touching a iron rebar/mesh it is dissimilar metals doing the deed. The alkalinity of the concrete that drives the iron-copper cell. All copper; /archives//html/Towertalk/2006-07/msg00437.html (8,259 bytes)
31. Re: [TowerTalk] Inverted L on three low bands (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Thu, 13 Jul 2006 00:39:48 -0700 (PDT); Tom Osborne <w7why@verizon.net> wrote: Hi Nick Sounds easy and good. One question--the vertical part of my 160 'L' goes up in a tree about 70 feet. What would I have to do, go up about 40 feet and ad; /archives//html/Towertalk/2006-07/msg00439.html (8,516 bytes)
32. [TowerTalk] magnetic force on conductors (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Thu, 13 Jul 2006 01:22:40 -0700 (PDT); Yes Jim, you brought up a good point. Even the fault current from a 20 amp circuit breaker on a hard short has enough force to make the wires slap the inside of a conduit hard enough to be audible ou; /archives//html/Towertalk/2006-07/msg00441.html (8,188 bytes)
33. [TowerTalk] Fan L (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Thu, 13 Jul 2006 01:29:42 -0700 (PDT); No problem using as described. All you need is radial system to support new band. The longer one now used but ones for each band will help and more is better with radials. Good luck, Nick WB7PEK -- Y; /archives//html/Towertalk/2006-07/msg00442.html (6,537 bytes)
34. [TowerTalk] Two band inverted L (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Thu, 13 Jul 2006 14:31:45 -0700 (PDT); A good source of spreader material is the local big box hardware or the local feed/farm store. They stock a fiberglass rod on various lengths and diameters as supports for electric fences. You can cu; /archives//html/Towertalk/2006-07/msg00471.html (8,218 bytes)
35. [TowerTalk] Aluminum radials (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 14 Jul 2006 00:38:43 -0700 (PDT); Aluminum has several characteristics that make it a bad choice for any current carrying conductor. First is the fact that when placed in soil under even the smallest current it wants to return to the; /archives//html/Towertalk/2006-07/msg00491.html (7,858 bytes)
36. [TowerTalk] Bazzoka L ? (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 14 Jul 2006 02:02:19 -0700 (PDT); I think what we have here is half a double bazooka antenna. If one was wont to use nec4 to model it, you can think of it as a folded monopole with extension. over a ground level radial system. Overal; /archives//html/Towertalk/2006-07/msg00492.html (7,785 bytes)
37. Re: [TowerTalk] Aluminum radials (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 14 Jul 2006 11:02:09 -0700 (PDT); Yes I have heard of this. Years ago when I used it I think it was called zinc chromate and was a primer for aluminum. This maybe different to what you refer to, but I have also seen the stuff in airc; /archives//html/Towertalk/2006-07/msg00510.html (9,206 bytes)
38. Re: [TowerTalk] zinc chromate, was Aluminum radials (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 14 Jul 2006 11:59:06 -0700 (PDT); Hi Geo, The older I get the more things that "was".;-) Thanks for the heads up on the chromate family of primers. I don't need a lot right now so I guess I'll peruse the paint stores and see what the; /archives//html/Towertalk/2006-07/msg00516.html (11,439 bytes)
39. [TowerTalk] Inverted L (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 14 Jul 2006 13:12:40 -0700 (PDT); Your link is anecdotal with out consideration to radiation E and H patterns. The chicken wire would dissolve in two years or so in the soil around here.(it rusts above ground in a little over a year.; /archives//html/Towertalk/2006-07/msg00522.html (7,447 bytes)
40. Re: [TowerTalk] Aluminum radials (score: 1): Author: Nick Pair <daweezil2003@yahoo.com>; Date: Fri, 14 Jul 2006 15:40:23 -0700 (PDT); Yes the Al conductor has become the most common service entrance conductor and is the most problematic. The Al creeps out from under the setscrew connections and since you can't get at the ones in th; /archives//html/Towertalk/2006-07/msg00528.html (15,565 bytes)

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