No pin is needed. There is a metal shell around the RJ45.
On Tue, Jan 16, 2024, 11:40 AM Pete Smith N4ZR <pete.n4zr@gmail.com> wrote:
> Oh Joy - another thing to check. I'm using a plain Ethernet Cat 5 patch
> cable from my amp to my computer. Judging by how floppy it is, I suspect
> no shielding at all - but a question - if there were a shield, which pin on
> the Ethernet connector would it be?
>
> 73, Pete N4ZR
>
> On 1/16/2024 10:22 AM, Jeff (W4DD) wrote:
>
>
> Pete, just another data point based on my experience with shielded Ethernet
> cables. Excerpt from one of my PPT's follows. I found the shield
> connections to be intermittent.
>
>
>
> Do Not Use Shielded Ethernet Cables from the Common Internet Sites
> The shield is not soldered to the metal RJ-45 shell. I measured 2-20 ohms on
> a group of 5 jumper cables shell to shell. Mouser Electronics has Amphenol
> Ethernet cables ($7) with the drain wire soldered to the metal RJ-45 shell at
> both ends. Resistance was less than 1 ohm for each of 5 cables measured
> (view the spec sheet at Mouser.com).
>
> Jeff, W4DD
>
> -----Original Message-----
> From: RFI <rfi-bounces+w4dd09=gmail.com@contesting.com>
> <rfi-bounces+w4dd09=gmail.com@contesting.com> On Behalf Of Pete Smith N4ZR
> Sent: Tuesday, January 16, 2024 9:32 AM
> To: N1MMLoggerPlus@groups.io; RFI List <rfi@contesting.com>
> <rfi@contesting.com>
> Subject: [RFI] USB Cable Shield Resistance was: Re: [N1MM+] open question
> about RFI & USB
>
> Interestingly, I just tested the shielding on a USB A to USB C cable I have,
> which looked like it should be fine, with a transparent jacket over woven
> shielding and a big ferrite bead - about 1 meter long, and measured 2.7 ohms
> - not good. What should be consider to be the upper permissible shield
> resistance?
>
> Moving this issue to the RFI reflector now...
>
> 73, Pete N4ZR
>
> On 1/16/2024 5:01 AM, Janez Majdic via groups.io wrote:
>
> Maybe also good to
> read:https://www.yoctopuce.com/EN/article/usb-cables-shielding-matters-as-w
> ell
>
> Regards, Janez - S51J
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