Audio Systems/RCA wire shielding

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Question
for my truck.I made my own RCA's with silver wire wrapped around tubing with a cotton sleeve over it.
I was told that wrapping copper tape around it,an grounding the tape.will reduce noise interference.
Is this true?

Answer
I can't visualize exactly how you did the wrapping and what openings you may have left for rfi to induce interference.  I also don't know what advantage there is to use silver wire.

Actually, in automotive vehicles the source of noise is so complex and comes from so many different sources that it is not a simple matter to just shield the interconnecting wires.  One of the most often causes of noise comes from the ignition system and is electromagnetically induced into the electronics independent of the connecting wires.

In any event, if you are having noise problems it must be investigated in order to find out the cause and the cure.   There are many good web pages that you can find with a few google searches that will help you identify the type of noise problem you are facing and the various processes that will help you to mitigate them.   For example, if the noise changes with the speed or rpm of the engine then you can be assured it is related to the ignition system of the vehicle.  If the noise is constant and not a function of engine or other performance it may be a head unit problem and so on...

Hope this will help you find the right solution for your circumstances.  

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Cleggsan

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Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.

Experience

Have been associated with audio design, standards, testing and component systems for over 40 years.

Organizations
Life Fellow Member of Audio Engineering Society Life Senior Member of Institute of Electronic and Electrical Engineers

Publications
Review technical manuscripts for IEEE Spectrum Write occasionally for high-end audio publications

Education/Credentials
BSEE/MSCS/MBA

Past/Present Clients
Past Employee/advisor to several well known audio products manufacturers

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