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Fan on Amp Unbeatable

So, I have an older amp from the 70s. It's a solid state amp and the fan is so loud it's distracting. It's my first largest solid-state amp. I've been using tube amps for the last 15 plus years. I can't imagine fans are supposed to be overwhelming Lee loud. Has anybody else ran into this kind of issue and if so, how did you fix it?
pawlowski6132

Showing 2 responses by mijostyn

mijostyn's avatar
mijostyn
8,223 posts
 
You may be able to replace the fan with a fan exactly the same size that is quieter. Digikey and Parts Express have hundreds of them. Measure the voltage on the fan leads it is usually 110 VAC or 25 VDC. If 25 VDC you can wire a pot to it to adjust the speed then as Sleepwalker suggests track the temp on the heat sinks. I have had several amps like the Krell KMA 100 that had fans you couldn't hear.  
mijostyn's avatar
mijostyn
8,223 posts
 
spinaker yes they were very special back then. Unfortunately those output transistors ran hot and many of them eventually blew their output stages. Like a light bulb turn them on and off a lot and eventually.....
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