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#1
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![]() "Art Unwin" wrote in message ... On Aug 30, 7:27 pm, "Dale Parfitt" wrote: "Art Unwin" wrote in message ... Tom, W8ji apparently is an expert with antennas having lectured at Dayton and has authored many technical articles around antennas, states that radiators must be straight for maximum efficiency, apparently It would assist us if you would cut and paste the quote from Tom' site. As I said before, the only place I ever saw this was with reference to Beverages- the statement is true and obvious to everyone except perhaps you Art. The onus is upon you to prove that a Beverage in any other deployment except straight would be better. I don't want to hear about your theories that only you embrace- a simple EZNEC model will be sufficient. Dale W4OP |
#2
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On Aug 31, 12:40*pm, "Dale Parfitt" wrote:
"Art Unwin" wrote in message ... On Aug 30, 7:27 pm, "Dale Parfitt" wrote: "Art Unwin" wrote in message .... Tom, W8ji apparently is an expert with antennas having lectured at Dayton and has authored many technical articles around antennas, states that radiators must be straight for maximum efficiency, apparently It would assist us if you would cut and paste the quote from Tom' site. As I said before, the only place I ever saw this was with reference to Beverages- the statement is true and obvious to everyone except perhaps you Art. The onus *is upon you to prove that a Beverage in any other deployment except straight would be better. I don't want to hear about your theories that only you embrace- a simple EZNEC model will be sufficient. Dale W4OP Dale I am happy with the responses of the group. Seems like they are united against the idea that radiators must be straight for maximum efficiency. I never mentioned anything about Beverages, that was somebody else. As far as Eznec is concerned I am not familiar with it as I use a program equiped with an optimiser that tries to bring your inputs in line with Maxwells equations. For instance, Eznec is only a calculator devised to provide answers to that supplied with additions to handle planar forms that are not in compliance. When you have an optimiser and your input is not pre guided ,such as a planar input, the optimiser will respond with a non planar design that includes the Coriolis force such that Maxwells equations are enforced , and that requires equilibrium. That also means the programs costs more but all antenna design companies use them as they recognise the true value of adherence to Maxwell's laws. The above justifies my position on radiators unless you want to declare "garbage in garbage out". I have a simple sample printed of a computerized array that shows the above in the patent request that is presently due for extinction. The military uses tipped radiators in many places to gain coverage of the donut hole as I have shown, but you will not see printed matter on the subject except from me. The WWW changes a lot of things regarding secrecy. Remember, when Tesla died he was working on a cheap energy system. The FBI raided his lab and took every thing which even now has not seen the light of day! I know. YOU now want me to provide a copy of the statement to you but then,. you can choose to believe or not to believe and use free speech to demand any thing. But I am not in your employ. |
#3
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Hi Art,
I just want to make sure what you are quoting from ToW8JI. So, if you have the time and inclination, please cut and paste Tom's comments about straight radiators so we can all be on the same page. I was the one who initially mentioned Beverages- because, although I am not an expert on Tom's site, that is the only referecne I recall about straight wires on his site. Dale W4OP |
#4
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On Aug 31, 1:31*pm, Art Unwin wrote:
The above justifies my position on radiators unless you want to declare "garbage in garbage out". I declare. |
#5
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On Mon, 31 Aug 2009 11:31:30 -0700 (PDT), Art Unwin
wrote: The above justifies my position on radiators unless you want to declare "garbage in garbage out". Close. It's like Kirchoff's Current Law. The sum of all comments over a point on Usenet is zero. http://802.11junk.com/jeffl/crud/11-655899.pdf Figure 3B on your patent application indicates: Computer Derived Performance (Use NEC, Mininec, or Mathcad style program) along with some gain, F/B, and Z computation results. Above that is part of a coordinate input table, showing wires 21 thru 23, used to define antennas in a variety of NEC2 modeling programs. That suggests that you have created an NEC2 (or NEC4) model for your Gaussian Radiative Cluster (Antenna). This would be a big help in understanding your antenna. I especially want to see how the elements can be random and resonant at the same time, and what degree of randomness is required. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#6
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Art Unwin wrote:
Tom, W8ji ... states that radiators must be straight for maximum efficiency, ... Why are short helical antennas less efficient than full-size straight radiators? Is there any way to fold a full-size straight radiator that results in increased efficiency? -- 73, Cecil, IEEE, OOTC, http://www.w5dxp.com |
#7
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Art wrote:
"I have untold books on antennas but none (not including ARRL stuff) provide any sort of reason that this could be true." It is almost self evident that if it takes 2 feet of wire to do the work of 1 foot, you get twice the resistance and loss. Best regards, Richard Harrison, KB5WZI |
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