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Why is my receiver getting so hot?
My Kenwood receiver always got pretty hot, so I purchased a fan which alleviated the problem. that was months ago. Now, the receiver gets so hot that in a matter of 10-15 minutes the sound becomes distorted, what can be causing this?
ANSWERS:
Class A receivers such as this are designed to operate in a very inefficient portion of the amplifier performance curve, and then naturally generate lots of heat. Your unit is heating to the point that the amplifier is operating in another region of its performance curve, causing the distortion. I suggest the right place to look is in the final amplification stages, which have large transistors with large heat sinks. Go to Radio Shack and get their cooling spray for troubleshooting, then, when the distortion presents itself, spray one of the transistors (not all) and listen for the distortion to go away. Do this until you find the offending circuit.
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