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Post subject: Re: Hum/Buzz from Supersonic 22 power supply
Posted: Sat Mar 24, 2018 10:21 am
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Joined: Thu Feb 22, 2018 11:39 am
Posts: 10
Location: Gothenburg, Sweden
Hi,

Now I have finally switched out the caps in the amp. I started by changing all the caps except C82, C83 and C84 (who were mounted on another PCB). This made NO difference to the noise. BUT, then I changed out C82, C83 and C84 and voila, it made a big difference. It's still not completley noise free but it's now usable again. Here's a phone recording of the noise I have now:
https://soundcloud.com/jacobthebluesman/sets/supersonic-22-noise-after-cap-change
and here is how it was before:
https://soundcloud.com/jacobthebluesman/sets/supersonic-22-noise
The buzz on the PCB is still there though, so I wonder where that could come from. Finding the source of that could maybe take me one step further to a noise free amp.


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