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bypass caps across bulk capacitors
bypass caps across bulk capacitors
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Old 15th October 2018, 06:59 PM   #1
bourdess is offline bourdess
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Default bypass caps across bulk capacitors

In the course of debugging a hum coming out of one channel of my Aragon 4004 MKII, I found that one of the caps had been leaking onto the floor of the chassis on the channel in question. I've decided to replace all 4 of the bulk (19000 uF) caps and was able to find exact replacements online. It seems that if one is failing, the others may not be far behind. My question is this:

Would it be advantageous to install a couple of bypass capacitors across the terminals of each of the bulk capacitors? Its a very open and roomy design, so adding them would not be a problem.

Thanks,

Mike
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Old 15th October 2018, 08:05 PM   #2
RNMarsh is offline RNMarsh  United States
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It is more effective if you place bypass caps (.2-.47mfd) at the amp PCB. Close to the circuitry.


THx-RNMarsh
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Old 15th October 2018, 08:18 PM   #3
scottjoplin is offline scottjoplin  Wales
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For an explanation as to why, see section 8 here Linear Power Supply Design
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Old 15th October 2018, 09:24 PM   #4
bourdess is offline bourdess
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Thanks for the responses. I can see myself referring back to that reference in the future.
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Old 16th October 2018, 02:51 PM   #5
traderbam is offline traderbam  Europe
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Quote:
Originally Posted by bourdess View Post
Thanks for the responses. I can see myself referring back to that reference in the future.
Pinch of salt required.
Why do you want to add bypass caps that weren't there before?
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