Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
 
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I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs.
Thanks and 73, Bob Nobis - N7RJN [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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On Tue,2/23/2016 9:05 AM, Robert Nobis wrote:
> I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs. Faced with exactly that issue, I chose Davis RF BuryFlex as the best compromise between shielding effectiveness and flexibility. I use only Amphenol 83-1SP connectors that I carefully solder myself. And I use only Amphenol adapters where required (elbows, barrels, Tees). When a male N-connector is required, I use the excellent Andros connectors. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Robert Nobis - N7RJN
Best possible could run into some money. You can get Pasternack to build a 36 in. jumper from RG223 ( double shielded and very small bend radius) for about $35. You can buy the parts for about $22 and DIY. http://www.pasternack.com/showProduct.aspx?SEName=uhf-male-uhf-male-rg223u-cable-assembly-pe3w00408&ProductID=
But I think LMR-240 UF is pretty good. It's got a foil and braid shield. It's what I use and I crimp/solder UHF connectors that I get from Max-Gain systems. The sheathing on the bury flex is a little stiffer than I like to deal with. vy 73,Dave N4KD On Tuesday, February 23, 2016 12:12 PM, Robert Nobis <[hidden email]> wrote: I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs. Thanks and 73, Bob Nobis - N7RJN [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Robert Nobis - N7RJN
Amp connectors, the ones you solder, and good quality RG-8X from DX
Engineering. -- 73's, and thanks, Dave For software/hardware reviews see: http://www.nk7z.net For MixW support see: https://groups.yahoo.com/neo/groups/mixw/info For SSTV help see: http://groups.yahoo.com/neo/groups/MM-SSTV/info On Tue, 2016-02-23 at 10:05 -0700, Robert Nobis wrote: > I am in the process of setting up my shack for SO2R operation with my > K3 and KX3. Just wondering what the best coax type to use for > jumpers and interconnections within the shack? I want to make sure I > have the best possible isolation between the two rigs. > > Thanks and 73, > > > Bob Nobis - N7RJN > [hidden email] > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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In reply to this post by Jim Brown-10
Jim,
Thank you. I have heard of Davis RF BuryFlex, but have not seen it offered by any of the on-line sellers. I assume you purchase direct from the supplier? I concur with using Amphenol connectors. Thank you. 73, Bob Nobis - N7RJN [hidden email] > On Feb 23, 2016, at 11:10, Jim Brown <[hidden email]> wrote: > > On Tue,2/23/2016 9:05 AM, Robert Nobis wrote: >> I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs. > > Faced with exactly that issue, I chose Davis RF BuryFlex as the best compromise between shielding effectiveness and flexibility. I use only Amphenol 83-1SP connectors that I carefully solder myself. And I use only Amphenol adapters where required (elbows, barrels, Tees). When a male N-connector is required, I use the excellent Andros connectors. > > 73, Jim K9YC > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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In reply to this post by n4kd
Dave,
Thank you. RG223 looks like reasonably good cable. Not sure about LMR-240. I have had a bad experience with the dissimilar metals (copper and aluminum) with the LMR cable, although it was for a repeater application outdoors. 73, Bob Nobis - N7RJN [hidden email] > On Feb 23, 2016, at 11:58, David Kuechenmeister <[hidden email]> wrote: > > Best possible could run into some money. You can get Pasternack to build a 36 in. jumper from RG223 ( double shielded and very small bend radius) for about $35. You can buy the parts for about $22 and DIY. http://www.pasternack.com/showProduct.aspx?SEName=uhf-male-uhf-male-rg223u-cable-assembly-pe3w00408&ProductID= > > But I think LMR-240 UF is pretty good. It's got a foil and braid shield. It's what I use and I crimp/solder UHF connectors that I get from Max-Gain systems. > The sheathing on the bury flex is a little stiffer than I like to deal with. > vy 73,Dave N4KD > > On Tuesday, February 23, 2016 12:12 PM, Robert Nobis <[hidden email]> wrote: > > > I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs. > > Thanks and 73, > > > Bob Nobis - N7RJN > [hidden email] > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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In reply to this post by Robert Nobis - N7RJN
I'm not sure what you mean by "online sellers." Do you mean
"resellers," who take a percentage of our money for the wonderful "service" they provide? Like Elecraft, Davis RF has a website and you can order from them direct. This means no markup from a reseller, so we get the best bang for our buck. I've bought from Davis twice, and been quite pleased with their price, quality, and service. In addition to BuryFlex, I bought a spool of their RG11, which measures just like the much more expensive Belden 8213 RG11. The difference is advertising and markup by the dealers who sell Belden. My neighbor, W6GJB, has also bought from them, and has been quite pleased. Like any other good cable vendor, price will go down with quantity. I've bought 500 ft and 1,000 ft spools, but they will happily sell you much shorter lengths. 73, Jim K9YC On Tue,2/23/2016 1:41 PM, Robert Nobis wrote: > Thank you. I have heard of Davis RF BuryFlex, but have not seen it offered by any of the on-line sellers. I assume you purchase direct from the supplier? I concur with using Amphenol connectors. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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In reply to this post by Robert Nobis - N7RJN
On Feb 23, 2016, at 16:41, Robert Nobis <[hidden email]> wrote: > > Thank you. I have heard of Davis RF BuryFlex, but have not seen it offered by any of the on-line sellers. I assume you purchase direct from the supplier? I concur with using Amphenol connectors. The Wireman sells Davis RF BuryFlex RG-8, product number 103A. https://thewireman.com/coaxp.html Hope this helps. 73, John K8AJS [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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So does Davis... http://www.davisrf.com/buryflex.php. I've bought a lot of wire from them. Plus, I like calling them to place the order, rather than filling out an automatic form.
vy 73,Dave N4KD On Tuesday, February 23, 2016 5:13 PM, John E Bastin <[hidden email]> wrote: On Feb 23, 2016, at 16:41, Robert Nobis <[hidden email]> wrote: > > Thank you. I have heard of Davis RF BuryFlex, but have not seen it offered by any of the on-line sellers. I assume you purchase direct from the supplier? I concur with using Amphenol connectors. The Wireman sells Davis RF BuryFlex RG-8, product number 103A. https://thewireman.com/coaxp.html Hope this helps. 73, John K8AJS [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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In reply to this post by Robert Nobis - N7RJN
Look into Ecoflex. http://www.vibroplex.com/contents/en-us/d39.html
I'm using it from the gear in the shack through the wall --> Andrew Heliax to the base of the tower---> Ecoflex up the tower. So far, so good. I measured some Buryflex years ago for a friend who had 100' dropped shipped to me. It's in the storage room someplace and not in my antenna system. On 2/23/2016 2:41 PM, Robert Nobis wrote: > Jim, > > Thank you. I have heard of Davis RF BuryFlex, but have not seen it offered by any of the on-line sellers. I assume you purchase direct from the supplier? I concur with using Amphenol connectors. > > Thank you. > > 73, > > > Bob Nobis - N7RJN > [hidden email] > > >> On Feb 23, 2016, at 11:10, Jim Brown <[hidden email]> wrote: >> >> On Tue,2/23/2016 9:05 AM, Robert Nobis wrote: >>> I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs. >> Faced with exactly that issue, I chose Davis RF BuryFlex as the best compromise between shielding effectiveness and flexibility. I use only Amphenol 83-1SP connectors that I carefully solder myself. And I use only Amphenol adapters where required (elbows, barrels, Tees). When a male N-connector is required, I use the excellent Andros connectors. >> >> 73, Jim K9YC >> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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In reply to this post by Robert Nobis - N7RJN
Just a comment on Times Microwave LMR cables:
In outdoor application its "VERY" important to seal connectors properly. The aluminum tape shield oxidizes in presence of moisture with resulting change in impedance and attenuation. I just replaced a 45-foot run of LMR-600 which hangs off my eme tower supported by a pilot cable. Because it is run vertically water entered the upper connector and pooled at the bottom connector such that when I pulled off the N connector water poured out in a stream for a couple minutes. I finally had to replace the run as SWR would rise every time temperature went above 32F. After removal I cut away sections of the bottom end of the cable to reveal that about 18-inches had badly corroded. New LMR-600 run has my 2m SWR lower (0.14) than it has been for about three years (so this condition had been increasing over time). I run LMR-400, LMR-400UF, LMR-240 and LMR600 outside (along with LDF7-50A and LDF5-50A Heliax). Heliax appears to totally isolate moisture to outside the copper shielding if connectors are well constructed and sealed. I use the LMR-240 for receive lines after my preamps to run down to ground level where I connect LMR-400 to continue to the "shack". LMR works just fine if you keep moisture from entering the coax. Only runs of RG-213 are to my 600m inverted-L, 80/40m inverted-V and to my tribander yagi. 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
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For exterior use, I choose to use the LMR-xxx-DB series which is
impregnated with a moisture reduction substance.... intended for direct burial, it adds an additional measure of protection. ______________________ Clay Autery, KG5LKV MONTAC Enterprises (318) 518-1389 On 2/24/2016 11:39 AM, Edward R Cole wrote: > Just a comment on Times Microwave LMR cables: > > In outdoor application its "VERY" important to seal connectors properly. > > The aluminum tape shield oxidizes in presence of moisture with > resulting change in impedance and attenuation. I just replaced a > 45-foot run of LMR-600 which hangs off my eme tower supported by a > pilot cable. Because it is run vertically water entered the upper > connector and pooled at the bottom connector such that when I pulled > off the N connector water poured out in a stream for a couple > minutes. I finally had to replace the run as SWR would rise every > time temperature went above 32F. After removal I cut away sections of > the bottom end of the cable to reveal that about 18-inches had badly > corroded. New LMR-600 run has my 2m SWR lower (0.14) than it has been > for about three years (so this condition had been increasing over time). > > I run LMR-400, LMR-400UF, LMR-240 and LMR600 outside (along with > LDF7-50A and LDF5-50A Heliax). Heliax appears to totally isolate > moisture to outside the copper shielding if connectors are well > constructed and sealed. I use the LMR-240 for receive lines after my > preamps to run down to ground level where I connect LMR-400 to > continue to the "shack". > > LMR works just fine if you keep moisture from entering the coax. Only > runs of RG-213 are to my 600m inverted-L, 80/40m inverted-V and to my > tribander yagi. > > 73, Ed - KL7UW > http://www.kl7uw.com > "Kits made by KL7UW" > Dubus Mag business: > [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Robert Nobis - N7RJN
My suggestions are LMR400UF or Andrew FSJ1-50. They are the only cables I use for low-power jumpers in my shack. Down stream from my larger amps, I use LMR600UF. BTW, Tessco is a great place to buy all of your cable and connector hardware. Alan – N7MIT |
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