This overview came over the transom today. Interesting background, supporting
what our RFI gurus have been saying.
Passed for information.
http://images.link.pentondes.com/Web/PentonDES/%7B31de5541-facc-4790-8147-385e74703ca2%7D_wp-design-by-desense-workflow-interference-free-design-electronic-devices.pdf
73,
AG6CX
Sent from my iPhone
> On Mar 28, 2018, at 11:34 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
>> On 3/28/2018 11:22 PM, Jeff Blaine wrote:
>> I was hoping someone may have found a "quite" switch that could be
>> recommended. Some of the semi-pro (e.g. Netgear home-office rack mount)
>> stuff has metal cases -- but I don't know if that actually means they are
>> quieter.
>
> Hi Jeff,
>
> I have no equipment recommendations, but can at least offer these thoughts.
>
> Unfortunately, shielding requires FAR more than putting circuitry in a
> conductive enclosure. Many such boxes are "clamshells" with paint insulating
> the places where they SHOULD meet, so they're not really shielded. Every
> cable SHIELD that enters a shielding enclosure must be bonded to the
> enclosure AT THE POINT OF ENTRY. Any unshielded conductors must go through
> feed-through caps that shunt RF to the chassis, but doing that with data
> circuits would likely trash the data. :) This problem can be solved by one or
> more ferrite common mode chokes on the cable.
>
> 73, Jim K9YC
>
>
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|