Cmoy capacitor question

[MIKEp]

Edit: new question further down

 

[nikongod]

you can use caps of a higher voltage "spec" than what is required.

be warned that they will typically be of larger physical size for any given value of capacatance. for what its worth, folks have commented that caps with higher voltage ratings sound better. i have never personally compared sound from a low and high voltage same value cap.

edit: where are you looking/what are you looking for that you can only find 50V caps? try mouser, and digikey unless youa re looking for botiqueish parts.

 

[Lil_JV]

220uf/50V will be fine. The only thing is you may have a hard time squeezing them in if you are using tangents layout. The only difference you will notice is size. There may be some spec differences but you will be fine using what you have.

Let me guess... You don't want to order online so you are trying to get everything locally. Some advice: Order everything online because you probably won't find the opamp locally. For a CMoy you can get everything from DigiKey except for the board.

JV.

EDIT: Too slow. I was watching TV as I was typing.

 

[MIKEp]

well yes i am shopping at radioshack for all of my stuff and have only spent about 30 canadian for all of it. I heard about the free samples from some other guy and ordered them not knowing what i was doing. well im not going to do that again. I'm keeping the samples cuz it would cost more to send them back to the company than they're worth. ne ways i bought the caps at raioshack in an assortment pack. im going to an electronic store for the last two caps and hope to find something closer to what i actually want.

Thanks for your help

 

[mono]

Among the same family of caps, a higher voltage rated cap would do better in a CMOY because of it's inherantly lower impedance. It may make more difference in a CMOY than other amps because these are the lone capacitors in one.

However, 220uF is just a baseline recommendation... essentially you would fit the largest cap in the best quality (preferred) that the available space allows. Thus, best to determine the available diameter, lead spacing, and height (the amp case allows) and go from there, giving preference to something larger than 25V, 220uF.

Since Radioshack doesn't have any very good caps, if you have any other alterntive you might take it. Then again, we dont' know if this will be your lone amp, primary amp, or just a warmup for something more advanced so only you know how much to put into it.

 

[MIKEp]

I'm sorry for asking all these silly questions but i have very limited knowledge.

I went to a store today and picked up some mylar caps for the capacitors in the pic below. The site reccomends using full-size film caps (polypropylene) but these seem to meet all the requirements (0.1μF and over 50V). These should work, ... right (whats the difference). Please tell me, this is my last question, ... i think

 

[Daroid]

Mylar = met. polyester. Mylar is a trademark name it seems. If that is true then:
Polyester isn't very good for audio applications, but it will work absolutely fine! - keep them, read why:

Polypropylene is usually recommended for the sole reason that if it is used for coupling in a signal path it sounds better, but it is relatively large compared to the polyester variant. I don't think it matters at all in a Cmoy. I did some experimenting too and couldn't tell the difference in that specific C2 spot. With the SDS labs amp it was fairly obvious.