Best Cable for canceling RFI

Either the amps are sensitive to RF signals or the cords ( power OR speaker ) are acting as antennas. Sometimes, simply moving the cords into a different pattern can cure the problem. Sometimes altering their length can cure the problem.

I would start off by trying to wind up any excess power cord into a small coil as tightly as possible near the amp. This will create a choke and may get rid of or minimize the problem. If that doesn't work, you can try attaching a ferrite clamp to the power cord very near the amp. You might also try shielding the amp ( large metal pot, turkey pan, etc... ) to see if the tubes or circuitry are picking up the signal if it doesn't already have a "cage" covering the tubes. While i would think that your speaker cables would be okay due to their geometry, try substituting some different cables to see if that helps..

Depending on the situation, it can be a tough one to solve. Take your time and do it step by step. Sean
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Thanks, Sean, I will pick up some ferrite rings and see.
Nothing else works.

KP

I hope I am not accused again of trying to schlep HMS cables here if I spread some information of HMS cables concerning a specific topic.
I will notify anybody that my opinion could be biased by the fact that I am the importer of said cables and I admit also that HMS is not the only good cable out there, (but probably one of the few cable brands, reasonably priced for that kind of performance)
I have discussed this topic of RFI/EMI rejection extensively with Dr. Strassner , since he said that rejection of EMI/RFI will be a growing issue in the future (more computers, more cell phones, more broadcasting towers, etc.)so he believes in extreme shielding of all of his cables, plus an additional 6 step filtering, which accumulates in a 99% rejection of EMI/RFI with his cables.
So if someone really suffers from that kind of problems, he should audition several brands of cables to find out, if cables are the cure for his problems or if investing money in a power conditioner will help. Actually the HMS power cords come with a build in power conditioner and cleaner, but there are several good brands available as stand alone power cleaners if you would like to invest more money. I also use the Stealth power cleaner along with said power cords.
I will repeat my Matra all over again: Audition, audition, audition.

Tekunda- A much more respectable approach, nice job :)

~Tim

FWIW I did the test of disconnecting all IC's at the amp not the source. I switched the power cable from one outlet to another.
I do seem to have more noise from the speaker nearest the outside wall.
My question is - If the sound is not amplified by the amp (volume knob has no impact) is it likely that the speaker wire is the problem?
are ferrite rings on the speaker cables a possiblity?