<div dir="ltr"><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><div><br></div><div>-- Tom, N5EG</div><div><br></div><div><br></div><div><br></div><br><div class="gmail_quote"><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">tangerinesdr@lists.tapr.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<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>
</div>
<blockquote type="cite">
<div dir="ltr">Jules,
<div><br>
</div>
<div>This is something I had not thought about. </div>
<div><br>
</div>
<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://www.belden.com/products/enterprise/copper/connectors/cat-6a-jacks" target="_blank">REVConnect® Connectivity System</a>,
but these appear to be components of a building wiring system,
not board mountable jacks. Further research is required.<br>
</div>
<div><br>
</div>
<div>Dave</div>
</div>
</blockquote>
<br>
</div>
-- <br>
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</blockquote></div></div>