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    Floating one end of the shield makes for a good antenna for RF. 
    Shields on wires carrying digital signals should be grounded at both
    ends.  If within equipment, the cables should be dressed close to
    the chassis or structure to minimize ground loop area.  In this
    case, this is not a consideration.<br>
    <br>
    David N1HAC<br>
    <br>
    <div class="moz-cite-prefix">On 5/30/20 11:45 AM, Tom McDermott via
      TangerineSDR wrote:<br>
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    <blockquote type="cite" cite="mid:CACO3nRSkGA=JDBKd2LojMBEeaU7Rp2=7+4g0Hafk34vA3gY+jw@mail.gmail.com">
      
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        <div>I have no idea where the idea that the shield should be
          unconnected at the remote end came from. <br>
        </div>
        <div>In my opinion this is contrary to what probably needs to be
          done.  I think Scotty put a jumper on that</div>
        <div>line so it could be tried both ways.   Normally one floats
          a shield if ground return currents from some</div>
        <div>external path are expected.   I don't see where those would
          come from in this situation.</div>
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        <div>-- Tom, N5EG</div>
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          <div dir="ltr" class="gmail_attr">On Sat, May 30, 2020 at 8:31
            AM Julius Madey via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org" moz-do-not-send="true">tangerinesdr@lists.tapr.org</a>>
            wrote:<br>
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            <div> <font face="Arial">Dave,<br>
                I hadn't either until I saw the note from Phil.  I've
                been using your original small adapter board with the
                Quicc connectors so haven't run into the issue yet. <br>
                <br>
                Two shielded RJ45 PC through hole jacks in my parts
                drawer, made by BERG, have non ferrous shields. 
                Couldn't find the BERG part on line but DigiKey carries
                several candidates.  One is AMP 5558342-1, the data
                sheet for which shows phosphor bronze as the shield
                material.  Since the shields on the RJ jacks of the
                three SBC's I have are all non-ferrous, it may be that
                for RJ45's, non-ferrous construction is the usual.<br>
                <br>
                With regard to the shielded RJ plugs on the extension
                cable, since the current recommendation seems to be to
                only tie the shield to ground at the 'local' end, it's
                possible to remove the shield on the plug at the remote
                end; just did that with one of mine.<br>
                <br>
                Jules<br>
              </font><br>
              <div>On 5/30/2020 10:34 AM, David Witten wrote:<br>
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                <div dir="ltr">Jules,
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                  <div>This is something I had not thought about.  </div>
                  <div><br>
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                  <div>It does appear that Belden does sell a line of
                    Cat 5+ connectors that have little or no metal in
                    them beyond the contacts:</div>
                  <div><a href="https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.belden.com%2Fproducts%2Fenterprise%2Fcopper%2Fconnectors%2Fcat-6a-jacks&data=02%7C01%7CDavid.G.McGaw%40dartmouth.edu%7Cc604d718dc0b454744bb08d804b0ab83%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C637264504133494031&sdata=W0Tg8swPDEIfa0e9lfoTLN2tkgGOjxU5hk3ONa%2FTus0%3D&reserved=0" originalsrc="https://www.belden.com/products/enterprise/copper/connectors/cat-6a-jacks" shash="HLImC09lQkxdsQnvgcBRVzZmNTP+60bZI7ABbLmPpcKut5rG0cGPBslYeXEjZiAGUnE3SeLOuHqqSOqBQ+0cBX7UT7aUDOoyabRpA9He6Mc/fBwsGK9VxQBwOIlbMpXECN6NUUPBoNtYUZduKwl2TAV7TWMutiHtPBQwrSdJdLg=" target="_blank" moz-do-not-send="true">REVConnect®
                      Connectivity System</a>, but these appear to be
                    components of a building wiring system, not board
                    mountable jacks.  Further research is required.<br>
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                  <div>Dave</div>
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            -- <br>
            TangerineSDR mailing list<br>
            <a href="mailto:TangerineSDR@lists.tapr.org" target="_blank" moz-do-not-send="true">TangerineSDR@lists.tapr.org</a><br>
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