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Electronics Forum / Electronics / February 2009Copper shielded 50 Ohm coax
Hi all The 50 Ohm RG58 coax sold by Jaytoy has a shielding that won't readily solder. While Alronics has 75 Ohm RG59 with copper shielding, which does solder OK they cannot supply RG58 with this. Does nyone know of am surce of a small amount of copper shielded RG58 50 Ohm? TIA > Hi all > [quoted text clipped - 6 lines] > > TIA The braid on the RG58 *should* be tinned copper. It must really be crap if it doesn't take solder. Andy On Feb 24, 8:36 am, "MoiInAust" <u...@user.com> wrote: > Hi all > [quoted text clipped - 6 lines] > > TIA The braid on the RG58 *should* be tinned copper. It must really be crap if it doesn't take solder. Andy Well the Jaytoy definitely does not! And Altronics say they don't have any copper shielded RG58. Where do you get yours? > <a...@woodtech.net.au> wrote in message > [quoted text clipped - 19 lines] > Well the Jaytoy definitely does not! And Altronics say they don't have any > copper shielded RG58. Where do you get yours? Email me off-list (change "agw" to "andy") , we have 100's of metres of good quality RG58C/U here. Andy > Hi all > [quoted text clipped - 4 lines] > Does nyone know of am surce of a small amount of copper shielded RG58 50 > Ohm? you could try cutting up some old coaxial ethernet cables. the last one I cut up had copper shield, >> Hi all >> [quoted text clipped - 7 lines] > you could try cutting up some old coaxial ethernet cables. > the last one I cut up had copper shield, Great idea! I'll have a look. >>> Hi all >>> [quoted text clipped - 9 lines] > > Great idea! I'll have a look. This type of coax usually has a stranded center conductor as opposed to a solid center conductor. Is that a problem? Twist the screen and wire together you want to attach and use some of that conductive glue Jaycar have. Works perfectly. > Twist the screen and wire together you want to attach and use some of that > conductive glue Jaycar have. > Works perfectly. Conductive 'glue'? Sounds very Jaytoy! Or perhaps you were serious? Surely can't be very satisfactory when a good low impednace connection at UHF is required? >> Twist the screen and wire together you want to attach and use some of that >> conductive glue Jaycar have. >> Works perfectly. > Conductive 'glue'? Sounds very Jaytoy! Or perhaps you were serious? Surely > can't be very satisfactory when a good low impednace connection at UHF is > required? It's called cold solder and it does conduct but badly , no where as strong as hot solder either >>> Twist the screen and wire together you want to attach and use some of >>> that conductive glue Jaycar have. [quoted text clipped - 4 lines] > It's called cold solder and it does conduct but badly , no where as strong > as hot solder either Oh that stuff, typical Jaytoy! Typical and up there with farting ashtrays and their other junk! Pity about Altronics though. They have been good on other things. I suppose I could raise a mortgage and try Radiospares? They used to be quite reasonable in price many years ago in the UK but perhaps they've been bought by some US entity? >> Twist the screen and wire together you want to attach and use some of that >> conductive glue Jaycar have. >> Works perfectly. > Conductive 'glue'? Sounds very Jaytoy! Or perhaps you were serious? Surely > can't be very satisfactory when a good low impednace connection at UHF is > required? they have conductive demister repair paint (gotta get some to fix my phone keypad) hmm, UHF thin ethernet has most of the energy between 10 and 20Mhz. the ethernet cable may not work well for UHf. > you could try cutting up some old coaxial ethernet cables. the last one > I cut up had copper shield, What was the exact label on the cable? The only tme I've seen that type, it was very stiff IBM and they were not "ethernet" >> you could try cutting up some old coaxial ethernet cables. the last one >> I cut up had copper shield, > > What was the exact label on the cable? I don't recall and I have misplaced it. > The only tme I've seen that type, it was very stiff IBM and they were not > "ethernet" IBM was using token ring. the wiring as far as I could tell was still 50 ohm coax with BNC connectors, > >> you could try cutting up some old coaxial ethernet cables. the last one > >> I cut up had copper shield, [quoted text clipped - 8 lines] > IBM was using token ring. the wiring as far as I could tell was > still 50 ohm coax with BNC connectors, IBM used RG/62 which is 93 ohm.  Signaturehttp://improve-usenet.org/index.html Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm >>>> you could try cutting up some old coaxial ethernet cables. the last one >>>> I cut up had copper shield, [quoted text clipped - 7 lines] > > IBM used RG/62 which is 93 ohm. A lot in the later installs was rg59au ( 75hom) decent coax is easy to find but of course is not free. > >>>> you could try cutting up some old coaxial ethernet cables. the last one > >>>> I cut up had copper shield, [quoted text clipped - 11 lines] > > decent coax is easy to find but of course is not free. That depends on how long it takes you to wreck out an old installation. Sometimes its already piled up beside the dumpster for you. :) Signaturehttp://improve-usenet.org/index.html Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm >>>>> you could try cutting up some old coaxial ethernet cables. the last >>>>> one [quoted text clipped - 13 lines] > > decent coax is easy to find but of course is not free. IBM had 2 significantly different systems in widespread use and some others as well. The 3270 Display System used 93 ohm coax to distribute Video from a controller to all the screens in an office in a STAR configuration. While the PC Network introduced in the 80s used 75ohm coax in a serial configuration with a terminator at the far end. The prescribed coax was RG-6 (thick heavy lo loss ) for long runs and RG-59 (small flexible hi loss ) for device connectors on the desk. A later arrival was IBM TokenRing which used twisted pair and a clumsy big black plug that was the same both ends ( there was no male and female). John G. > Hi all > [quoted text clipped - 6 lines] > > TIA A lot of the RG59 cable tv cable is aluminum. Cheaper, lighter. Try a ham-radio store. Depending on how much you want, any ham will probably have some in the attic. |
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