Noob Capacitor Questions

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goiks
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Noob Capacitor Questions

Post by goiks » Wed Nov 19, 2008 2:43 pm

I'm hoping to take on building the Thomas Henry MPS as one of my first DIY projects. The capacitor section of the parts list is a little vague for a noob, and I want to make sure I'm getting the right stuff. Here are my questions:

poly - does this mean polystyrene, polyester film, or organic polymer?
mylar - this is metallized polyester film, right?
disc - ceramic disc?
electrolytic - aluminum electrolytic?

also, the list states all capacitors are 16v. i'm finding that not all are available with that rating, am i correct in assuming a higher rating is ok?

thanks for any help. it sucks to have to ask such simple questions, but i really want to start learning and have to start where i'm at. any recommendations for good learning resources would be appreciated.

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neandrewthal
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Re: Noob Capacitor Questions

Post by neandrewthal » Wed Nov 19, 2008 2:51 pm

goikem wrote: poly - does this mean polystyrene, polyester film, or organic polymer?
mylar - this is metallized polyester film, right?
disc - ceramic disc?
electrolytic - aluminum electrolytic?


Poly usually means polyester, you can also use polyester where mylar is specified, and pretty much anything bipolar where ceramic is specified, it just means that you are using a higher quality capacitor than is required for that function.
also, the list states all capacitors are 16v. i'm finding that not all are available with that rating, am i correct in assuming a higher rating is ok?

Yes, that means the maximum voltage, no harm in overdoing it.
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goiks
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Post by goiks » Wed Nov 19, 2008 5:12 pm

thanks, that helps.

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consumed
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Post by consumed » Wed Nov 19, 2008 8:19 pm

Capacitors: A Field Guide to Types and Habitats

http://musicsynthesizer.com/txt/caps2.txt

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mark_olson
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Post by mark_olson » Thu Nov 20, 2008 7:28 pm

consumed wrote:Capacitors: A Field Guide to Types and Habitats

http://musicsynthesizer.com/txt/caps2.txt
My first post. I've come out of the lurk to say thanks.

I didn't ask the original question but I must say, thank you so much for this. I have spent hours and hours of my life googling for info on caps without seeing this, which is the best thing I've seen of its kind.

Mark

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goiks
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Post by goiks » Thu Nov 20, 2008 7:46 pm

consumed wrote:Capacitors: A Field Guide to Types and Habitats

http://musicsynthesizer.com/txt/caps2.txt
thank you very much.

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consumed
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Post by consumed » Fri Nov 21, 2008 1:23 am

many thanks to harry bissell for writing it :guinness:

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Post by fonik » Fri Nov 21, 2008 1:53 am

he wrote some handy notes about grounding, too:
http://www.modular.fonik.de/files/grounding_101.pdf
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