Shielding for FM tuner?


My fm tuner picks up noise from the cd player underneath it when the cd power is on. Also there is interference when I'm listening to the tuner while the computer is on. It's not practical in my room to move the cd player and computer.
Is there something I can place underneath the tuner to shield it from interference. A sheet of copper or something?
And yes, I know I can just turn the cd player off.
broubin

Showing 1 response by sean

Not only are there different size ferrite chokes, but there are also different grades of ferrite. On top of that, there is NOWHERE near the amount of RF leakage coming out of ANY audio related device to ever "saturate" any of the common ferrite's sold for this purpose. If there was, we would all have cancer due to RF exposure. Any leakage that is taking place can probably be measured in milliwatts of power, not kilowatts.

Personally, i would look at both the routing and construction of the interconnects, power cabling and antenna feedling being used on both the components and the computer. The use of some relatively inexpensive but well shielded power cords like the Belden aka "Volex" designs may solve your problems and / or take you at least a step in the right direction. These can typically be had for appr $10 apiece if you do some shopping.

Making sure that your antenna feedline is properly terminated ( solid connector on the cabling with a solid connection to the tuner ) would also be inexpensive and a potential step in the right direction.

After that and if cable routing doesn't solve your problems, you might want to try some shielded interconnects. Grounding all of the component chassis outside of the AC cords may / may not help here too.

These are all very basic and inexpensive approaches to solving your problem as you didn't mention anything about what you were willing to spend to correct the problem. Sean
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