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How to get rid of radio signal coming from my stereo? Answered

My stereo (sony micro hi fi component system cmt-ep707) consistently plays radio signals.  I get the radio signals when I am any setting other than the fm/am tuner.

How could i get rid of the radio signals? 

Is it something to do with the transistors?
or the speaker cable being slightly exposed or something?

7 Replies

user
Re-designBest Answer (author)2011-02-13

Check all connections to the amp, especially inputs. Make sure there is no corrosion and they are plugged in tight. Sometime corrosion will create a detector for radio signals.

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NachoMahma (author)Re-design2011-02-13

.  +1. Might want to also check grounding, especially at the receptacle (sometimes just turning the plug half-a-turn will help), and short any unused inputs.

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pdxpdx (author)2011-02-16

Use the insulating tape to wrap the ground socket, view image attached! (sorry for the quality of the image but it's made with a quite old phone)

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Houdinipeter (author)pdxpdx2011-02-16

it doesn't actually have a ground socket..
only the two american prongs.

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pdxpdx (author)Houdinipeter2011-02-17

wrap a thin foil of aluminium (the one found in your kitchen) around the amp... that should do it.... if you still hear a buzz then its not your amp which is getting affected by radio waves or its not radio waves which is making the noise...

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AndyGadget (author)2011-02-13

It appears that you are not the only one with that problem. It's been reported HERE and HERE, strangely,  both in Manhattan.  Are you near any strong transmitters where you live - It could be a design problem with the shielding of sensitive parts of the amplifier.
There are also several other ideas and suggestions in the pages I linked.

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steveastrouk (author)2011-02-13

What other inputs are you using ? The classic path is through an auxilliary input. Put a ferrite bead on the input cables - you COULD get them in Radio Shack.

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