My fans have always been noisy. I can tell immediately when they come on at the slowest speed with my headphones on. The noise sounds like rough bearings but as they get faster both fans get noisier. They definitely are not whisper quiet by any stretch of the imagination.
I just took the top cover off the K3 and there are no wires catching the fan blades. The fan with the noisy bearings is the one on the right next to the antenna sockets. But both fans are noisier the faster they run and they drown out my computer fan. I guess I need to ask Elecraft for replacement fans. Barry Simpson VK2BJ K3 # 1397
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