>Peter,
>
>>Randy, I surely admit that it looks like resonance, and I didn't check that with our customers involved. But yes, we have that (for some ages ... But hmmm, not tested ;)
>
>The fact that your problem was only happening at a limited number of locations was a factor that led me to suggest testing the cabling.
>
>I'll be interested in hearing the results, should someone choose to do the tests.

Well, I should begin with ourselves, right ? so I will. In dutch we say you never know how a musquito may catch an elephant. In dutch then.

Thanks again.