Quote:
Originally Posted by Don_Zalmrol
The radio plays on every channel, but there is some kind of noise generated from somewhere inside the circuit
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Could you describe the noise a little better please, is it a buzz, static, howl, etc? Does the noise occur on all wavebands or only some of them?
Quote:
Originally Posted by Don_Zalmrol
I know this because I've played some records with my vinyl pickup through the radio
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I take it from the above that playing a record through the pick-up input is not affected by the noise? If this is so, it would appear the audio ouput stages and the power supply are not causing the noise issue.
Quote:
Originally Posted by Don_Zalmrol
...you can see that the smoothing cap has black scorch marks around it, so I will need to replace that one also.
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Yes if it is showing obvious signs of distress it will need replacing, even if it appears not to be the direct cause of the noise problem.
Regards