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okelk
Joined: May 08, 2014 Posts: 71 Location: Vienna
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Posted: Thu May 08, 2014 7:19 pm Post subject:
echo rockit - why bipolar electrolytic caps? |
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Hi! I'm new here.
I've been on the muffwiggler forum for some time now, and since I'm getting more and more into diy I thought this is the right place for me.
I recently started to build a echo rockit. (not finished yet....I ran out of parts...) And since I very rarely come by these parts I'm wondering: Why are there bibolar electrolytic caps used for dc blocking?
Are they for this specific purpose better than e.g film caps? and if so why?
Also: Is it ok to replace the tantalums with regular electrolytic caps? |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24075 Location: The Netherlands, Enschede
Audio files: 277
G2 patch files: 320
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Posted: Fri May 09, 2014 11:37 pm Post subject:
Re: echo rockit - why bipolar electrolytic caps? |
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okelk
okelk wrote: | Why are there bibolar electrolytic caps used for dc blocking? |
They provide a cheap way to get large values, so it is a compromise. you can use two polarized electroytics of double the value put back to back (+ to + or - to - .. does not matter) to make a non polarized one.
Quote: | Also: Is it ok to replace the tantalums with regular electrolytic caps? |
For analog audio stuff that'd be fine. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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okelk
Joined: May 08, 2014 Posts: 71 Location: Vienna
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Posted: Sat May 10, 2014 4:48 am Post subject:
Re: echo rockit - why bipolar electrolytic caps? |
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Thanks!
Blue Hell wrote: |
They provide a cheap way to get large values, so it is a compromise.
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Hm..that was why I was wondering...It totally makes sense that there is a 10uF bipolar cap, but the 1uF bipolar caps made me wonder...
Where I buy my stuff they don't even have bipolar electrolytics that small and 1uF foil capacitors are much cheaper...
Blue Hell wrote: |
you can use two polarized electroytics of double the value put back to back (+ to + or - to - .. does not matter) to make a non polarized one.
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That's what I did for the large 10uF one. seems to work fine. it's 11uF now though (22uf+22uf).
I don't see any reason why foil caps shouldn't work...I guess I will just try and see how it works... |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24075 Location: The Netherlands, Enschede
Audio files: 277
G2 patch files: 320
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Posted: Sat May 10, 2014 6:46 am Post subject:
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Sure, other caps will work too. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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