Re: 2235 power supply noise


Hi everyone,

C907 is a 1uF 400v film. I hadn't initially considered changing it as since it won't be prone to aging in the same way as the electrolytics. It won't cost much to give it a try though.

The squealing noise is definitely more in the region of 10,000Hz rather than 20,000Hz, I don't think I'd be able to hear much at a frequency as high as 20kHz.

I've tried slightly lowering the value of R919 but I haven't tried raising it yet. I'll give it a try and report back.

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