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Old 21st December 2012, 02:40 AM   #1
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Default swop electrolytic's for solid

Hi and thanks for reading this post.

Do you think it would be a good idea to replace the usual aluminium electrolytic capacitors on an amp board for the better specs of a solid state (polymer) type capacitor.

I have 4 aluminium electrolytic's around the dac chip (47uf 35v) and 4x 10uf 63v output coupling caps in the analog section, so 8 caps to replace in all, do you think a like for like replacement of the stock aluminium electrolytics for solid state polymer type caps would be okay in this situation.

I have done a google search and people have performed this on pc motherboards but there is not much on amps.

Many thanks in advance. John.
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Old 21st December 2012, 02:53 AM   #2
jcx is online now jcx  United States
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solid polymer electrolyte caps excell at low esr, esl - where those properties are important they can be technical "improvements"

last I looked they were only made for lower WVdc, no bi-polar versions

if you read Bateman's articles the latter properties point to their being poor choices for "signal path" coupling/DC blocking - if you believe nonlinear distortion has anything to do with "audio quality" in capacitors
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Old 22nd December 2012, 02:27 AM   #3
gootee is offline gootee  United States
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Why not try polypropylene types?
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Old 22nd December 2012, 11:22 PM   #4
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I don't think that polypropylene's will fit.
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Old 23rd December 2012, 12:00 AM   #5
gootee is offline gootee  United States
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Originally Posted by Speedskater View Post
I don't think that polypropylene's will fit.
Oh, right. This is an existing unit. The PP caps would probably be larger than the size of a D-cell battery, for 47 uF. Never mind.
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