Quote Originally Posted by Ah Pook View Post
Yamaha CA-810

Picked it up on Ebay a few years back. Had a buzzing noise, so cleaned everything with electronics cleaner. Noise went away.

The amp is set up with a Mac Mini run through a DAC to the amp. The sub woofer is plugged in to one side of the "pre out-main in". I'm getting a "revolving" static sound that seems to build when everything is on. If I unplug the amp the noise goes away for a while. If I unplug the sub the noise is diminished (same thing if I restart the Mac Mini). I've run two different laptops on this system with no problems, so not sure if the Mini is the issue.

Talked to Dr. Dan yesterday and dropping the amp off on Sat. There are some other issues I want him to look at. I normally wouldn't bother but I like sound of the amp.
CA-810 integrated is a nice unit. It's worth putting a little $ into it to keep it running. Yamaha has often been call, "A wire with gain." they truly are "Natural Sound." Yes, I'm a huge fanboy.

I don't recall off the top of my head if there are any in that model, but there's a specific transistor that was commonly used in many products of that era that are know to go noisy. SC458 "outhouse" cause it's rectangular with a sloped top and looks like an outhouse. Obviously it could be lots of other things, including dried out electrolytics, particularly in the PS sections... Also poor ground connections lead to lots of weird things. Hell, without a polarized plug, even switching that around can sometimes fix ground loop/noise issues.

Anyone cleaning switch contacts should be using only Caig DeoXit products. Magic sauce in there. Even then, there are special formulas without harmful solvents if the switch internals have some plastics. Read all about them here, http://store.caig.com/s.nl/sc.2/category.188/.f , but then buy wherever is cheaper.

Dr Dan should be able to get that thing squared away for you.

I don't have one here, but do have the CA-1000, CA-1010 and CA-2010. :-)

There's a reason jerrymrc gave me my current handle. He's another member here I met at a local AK GTG.