Re: Question: EMI Shielding for IDE cables

From: Rich Grise (null_at_example.net)
Date: 08/19/04 

Date: Thu, 19 Aug 2004 19:42:09 GMT

blue wrote:

> I am using flat ribbon IDE cables, 80 conductor / 40 pin. I understand
> that the second connector is a ground, which should eliminate cable
> crosstalk. But I do believe that my problem is actual RF or EMI
> interference. I need to use longer cables because of the chassis layout -
> 24" - 36". It would seem to be quite easy to shield the rounded cables
> from EMI with some aluminum tape, I just don't really know what I need to
> consider. An EMI shield doesn't really make sense to me without a ground.
> And, is aluminum muffler tape the right stuff to use?

It would certainly work, as long as you're sure that you make a good
connection to it. You can't solder aluminum, you know - I'd seriously look
into some kind of contact that's designed to connect aluminum to copper.

And only ground it at one end.

It would also probably help to see to it that it's not a spiral-wound
inductor - be sure that there's contact from one strip to the next.

Or, get really wide aluminum tape and attach it lengthwise.

Good Luck!
Rich

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