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#1
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On Sun, 07 Jan 2007 07:35:39 -0600, Cecil Moore
wrote: ml wrote: what is hardwire cloth? never heard of it or did mean that just figuratively Hardware cloth is a wire matrix where all the wires are soldered together. The openings are square and about 1/4"-1/2" on the sides. It is commonly used for small animal cages. I'm sure you know what it looks like, just not familiar with its name. It makes a better ground plane than chicken wire or hog wire. It also makes a good top/end hat. Check the link below. http://www.phoenixwirecloth.com/ |
#2
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helmsman wrote:
Check the link below. http://www.phoenixwirecloth.com/ That is quite extensive. Here's more what I had in mind: http://www.twpinc.com/twp/jsp/product.jsp?type=4 http://www.marcospecialtysteel.com/hardwarecloth.htm -- 73, Cecil http://www.w5dxp.com |
#3
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Cecil Moore wrote:
helmsman wrote: Check the link below. http://www.phoenixwirecloth.com/ That is quite extensive. Here's more what I had in mind: http://www.twpinc.com/twp/jsp/product.jsp?type=4 http://www.marcospecialtysteel.com/hardwarecloth.htm There is also expanded aluminum mesh (don't know if you already gave a url with it.) A friend gave me a load of this stuff, he works in demolition of buildings. The stuff was used in stuccoing buildings. All I had to do was go to his yard and persuade the mesh out of the stucco with a hammer. Problems I ran into was soldering it together, soldering aluminum takes quite a bit more skill than copper!!! Regards, JS |
#4
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John Smith I wrote:
Problems I ran into was soldering it together, soldering aluminum takes quite a bit more skill than copper!!! For some reason, the standard galvanized-dipped stuff is easy to solder. -- 73, Cecil http://www.w5dxp.com |
#5
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In article ,
Cecil Moore wrote: John Smith I wrote: Problems I ran into was soldering it together, soldering aluminum takes quite a bit more skill than copper!!! For some reason, the standard galvanized-dipped stuff is easy to solder. good idea technically speaking but i don't think i'll be able to hide anyof this stuff in his apartment if i go verticle i'd hope maybe to hide 2 counterpoise"" like wires around the far walls but certainly not mesh the only way i could think of using mesh is around the railing of the terrace hanging it verticle and putting the verticle antenna part ontop(higher) the railing is concreate |
#6
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![]() good idea technically speaking but i don't think i'll be able to hide anyof this stuff in his apartment if i go verticle i'd hope maybe to hide 2 counterpoise"" like wires around the far walls but certainly not mesh the only way i could think of using mesh is around the railing of the terrace hanging it verticle and putting the verticle antenna part ontop(higher) the railing is concreate Indoor/outdoor carpet over the mesh would be OK. I get a little worried about more than a couple of watts around areas with people. The new TenTec rig that is built to remote over a Lan/internet will add more options soon. John Ferrell W8CCW |
#7
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John Ferrell wrote in
: I get a little worried about more than a couple of watts around areas with people. Ah, this must be in the vein of "they have been unable to prove EMR safe". There are clear guidelines / rules on maximum permitted exposure to EMR that should allow design and operation of a station with confidence that it most unlikely to be an EMR hazard to one's self, family or the general public. Understanding and applying this is just another facet of the hobby today, though I concede it is beyond our new 6 hour hams (though that is part of the reason for their low power limit, should they observe it). One of my current projects is a self contained field strength meter for field measurement near a transmitting antenna. It consists of a small single turn untuned square loop, terminated in a known load, a detector and an inexpensive battery power LCD panel meter, all self contained mounted on a non-conductive stick with no trailing wires. It is fairly straight forward to produce an Antenna Factor / Freq chart using NEC, and a detector calibration (Vout/Pin). Trials have been encouraging with good correlation with expected field strength. On the other hand, it has been demonstrated that UV radiation is a health hazard, and there is no "safe" exposure level (ie a threshold below which no changes will take place in living cells). If one took a balanced approach, before becoming too concerned about EMR MPE, one would protect one's self from ANY sunshine, direct or indirect. If it appears that ham's brains have been addled by RF, they were probably that way before exposure to EMR, it might just be a factor for selection of hams. (You don't have to be mad to be a ham, but it helps!) Owen |
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