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  • DIY Hi-Fi: Vintage Receiver Repair and Modification

    Hello. I am a musician and not an expert by any means on HIFI but I had exactly the same problem as you with my KLH receiver, and I struggled for days checking and switching on and off but no luck. I did an awful lot of research but finallly telephoned to purchase a new amp when my brother, a computer engineer, suggested that on such an amp it is probably dirt\corrosion on the potentiometers. These can be cleaned he said with contact cleaner. I used WD40 and also squirted some at the knobs and push buttons at the front. Nothing happened but the next day I began to listen to a talk through the one speaker and after 5 minutes they both worked again. I cancelled my order for a new amp and one week later they still work perfectly. i love the sound from my KLH speakers and receiver and would...see more »Hello. I am a musician and not an expert by any means on HIFI but I had exactly the same problem as you with my KLH receiver, and I struggled for days checking and switching on and off but no luck. I did an awful lot of research but finallly telephoned to purchase a new amp when my brother, a computer engineer, suggested that on such an amp it is probably dirt\corrosion on the potentiometers. These can be cleaned he said with contact cleaner. I used WD40 and also squirted some at the knobs and push buttons at the front. Nothing happened but the next day I began to listen to a talk through the one speaker and after 5 minutes they both worked again. I cancelled my order for a new amp and one week later they still work perfectly. i love the sound from my KLH speakers and receiver and would, after forty years, be heartbroken to lose such a sound.

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