Krell KSA 50 (fan?) noise?

If you can, upgrade the temperature rating. The higher the rating, the longer the operating life at a given temp.

Nichicon is the go-to brand for the big power supply caps. Replace distributed, smaller isolating power caps with Panasonic FM where there are equivalents. These are usually in the 10-100uF range.

Best,
E

Also, fans are super cheap, and thanks to the PC industry, a lot of them are a lot quieter.

While you may be able to service it, you may also wish to just buy new. Make sure you match voltage and cubic feet per minute (CFM), then try to find the quietest one you can.

Best,

E

maurip
Krell KSA 50 (fan?) noise?

Replace the fan it's over 30 years old, but don’t get sucked into buying expensive roller bearing type they are noisy, use good quality bronze sleeve bush type, these are the quietest.

Cheers George

Many great thanks to all of you. Cheers