Re: 2235 power supply noise

mikepickwell@...
 

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.

Join TekScopes@groups.io to automatically receive all group messages.