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#21
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"Tam/WB2TT" wrote in message RG213 is WW2 technology. You are better of with Times LMR400, Belden 9913, or CPX1318. Tam/WB2TT don't quote me on this but some commercial guys put up a run of LMR400 (don't remember the legenth but was 200-300ft) and even this the antenna gain it was a negitive db number at the top.. this was at 450mhz. so i know we are talking about a long run there but i still don't think LMR400 is great.. Adair |
#22
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Gary V. Deutschmann, Sr. wrote:
And, do you want to trust factory installed cheap connectors? Installed by minimum wage workers? -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#23
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On Mon, 31 May 2004 12:37:31 -0500, Cecil Moore
wrote: Gary V. Deutschmann, Sr. wrote: And, do you want to trust factory installed cheap connectors? Installed by minimum wage workers? Who are judged by speed, not quality? Happy trails, Gary (net.yogi.bear) ------------------------------------------------ at the 51st percentile of ursine intelligence Gary D. Schwartz, Needham, MA, USA Please reply to: garyDOTschwartzATpoboxDOTcom |
#24
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On Mon, 31 May 2004 17:52:59 GMT, Gary S. Idontwantspam@net wrote:
On Mon, 31 May 2004 12:37:31 -0500, Cecil Moore wrote: Gary V. Deutschmann, Sr. wrote: And, do you want to trust factory installed cheap connectors? Installed by minimum wage workers? Who are judged by speed, not quality? Well, the average ham with a mighty 40-watt soldering iron and rusty pliers isn't going to do much better. At least the minimum wage guys are probably making cables with good tools -- 120-watt or better Weller irons with 1/2" tips, etcetera... Bob k5qwg Happy trails, Gary (net.yogi.bear) ------------------------------------------------ at the 51st percentile of ursine intelligence Gary D. Schwartz, Needham, MA, USA Please reply to: garyDOTschwartzATpoboxDOTcom |
#25
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 "Bob" == Bob Miller writes: Gary And, do you want to trust factory installed cheap connectors? Cecil Installed by minimum wage workers? Gary Who are judged by speed, not quality? Bob Well, the average ham with a mighty 40-watt soldering iron and Bob rusty pliers isn't going to do much better. At least the minimum Bob wage guys are probably making cables with good tools -- 120-watt Bob or better Weller irons with 1/2" tips, etcetera... I spend just about eight hours a day lately at a factory where cables and other stuff are made. Every day when I walk through the cable-making section, I think to myself "wow, I wish I could use those tools for my own nefarious purposes". The tools are expensive and pretty high-quality, but the employees see them as just... tools. Jack. - -- Jack Twilley jmt at twilley dot org http colon slash slash www dot twilley dot org slash tilde jmt slash -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAu3n0GPFSfAB/ezgRAqCgAJ9FDrd7JxbaB+hBBoBVzPH1hsRjLwCgpYc2 SveSZSMgPvl1QlLs8sQByBU= =Jya2 -----END PGP SIGNATURE----- |
#26
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don't quote me on this but some commercial guys put up a run of LMR400 (don't remember the legenth but was 200-300ft) and even this the antenna gain it was a negitive db number at the top.. this was at 450mhz. so i know we are talking about a long run there but i still don't think LMR400 is great.. Adair If you don't think lmr 400 is great, what do you think is that is in the same size ,type, price range ? As far as I know it and the 9913 type have the lowest loss for the nominal 1/2 inch size flexiable coax. There is some other coax types such as lmr 600 (think that is the number) that is some what larger and takes other more expensive connectors than the more comman types of pl259 or type N connectors. |
#27
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"Adair Winter" wrote in message ... "Tam/WB2TT" wrote in message RG213 is WW2 technology. You are better of with Times LMR400, Belden 9913, or CPX1318. Tam/WB2TT don't quote me on this but some commercial guys put up a run of LMR400 (don't remember the legenth but was 200-300ft) and even this the antenna gain it was a negitive db number at the top.. this was at 450mhz. so i know we are talking about a long run there but i still don't think LMR400 is great.. Adair Adair, You can get slightly different numbers from different sources, but from the CableXperts chart, the loss in 300 feet at 450 MHz would be 15.6 db for 213, 8.4 db for 9913, and 8.1 db for LMR400. For comparison, garden variety RG8 foam is 14.1 db, and 1/2 inch Heliax 4.5 db. Clearly, none is acceptable without an antenna mounted amplifier. Tam/WB2TT |
#28
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1ft, 3ft, 6ft, 10ft, 25 ft, 50ft, 100ft would perhaps be considered standard
(=often stocked). Still if you can get made to order instead then why not? "Gary V. Deutschmann, Sr." wrote in message ... "Old Ed" verbositized: Hi - Just curious: Do you know of any (reasonably priced) vendor that offers 9913 conveniently made up in standard lengths, with connectors? (CPX1318 is available in that form.) WHAT is a Standard Length? And, do you want to trust factory installed cheap connectors? Even if coax comes with connectors, I take those off and install my own, so I know it was done right and will last. TTUL Gary |
#29
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"Tam/WB2TT" wrote in message
Adair, You can get slightly different numbers from different sources, but from the CableXperts chart, the loss in 300 feet at 450 MHz would be 15.6 db for 213, 8.4 db for 9913, and 8.1 db for LMR400. For comparison, garden variety RG8 foam is 14.1 db, and 1/2 inch Heliax 4.5 db. Clearly, none is acceptable without an antenna mounted amplifier. Tam/WB2TT I agree, none of those are great numbers by any means. i honestly don't remember the specifics of it all, it might have been 800Mhz at 100 ft.. i just know that I whoever had put it up wasn't impressed with it.. (didnt' live up the posted specs) and i do believe the loss was verified with an IFR.. anyway.. i prolly should have kept my mouth shut not knowing everything in detail. Adair - kd5dyp |
#30
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I respect your opinion, but the question did not say 'multiband' antenna.
I used belden 300-ohm twinlead for 2-meters because I had a long run to the top of a tree on the other side of the yard. The specs showed it to be low-loss at 2-meters. The cost was affordable - much less than low-loss coax. So I used a u-bent half-wave piece of coax on each end and a 1/4-wave of 75-ohm coax with it - and it performed very well in the real world and the impedence match was good. I even had the project published in the Antenna Compendium a few yrs back. "Cecil Moore" wrote in message ... Ian White, G3SEK wrote: Parallel-line can be excellent for power distribution and phasing *within* a stacked array. I've used it on the moonbounce array at 432MHz, in a wet climate, but those were short, straight lines that are self-supporting with mostly air insulation - a completely different thing. Given a single dipole, multi-band antenna, parallel transmission line is just about the only choice. The 50 ohm SWR on a one-wavelength dipole is about 100:1. The 500 ohm SWR on a one-wavelength dipole is about 10:1. Under those circumstances, it is no contest. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.690 / Virus Database: 451 - Release Date: 5/22/2004 |
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