Add a remote control to a Harman Kardon HK6350R amplifier.

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Mixtel90 Guru Joined: 05/10/2019 Location: United Kingdom Posts: 8453	Posted: 04:23pm 29 Oct 2024       You'll probably know if they are getting bad by the increased hum level with the volume set to minimum. I wouldn't let it concern me too much. Electrolytics are generally designed to split neatly along the top to vent pressure if they fail completely, blowing out that insulating cover which helps keep the mess in the general area. At one time they weren't and could go with quite a bang! I don't change any capacitors unless they are definitely faulty. The only exception are the anode-grid coupling caps on valve amps where even the tiniest leakage will mess up the bias of the following stage. Modern caps are much, much better than old ones in that respect and changing them might save you the cost of a new output transformer.