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Cap Value Question

relaximus

relaximus

Consoles 'Я' Us
I'm getting ready to re-cap a pair of RtR IIIC's. They currently use a 3.0uF 50v and a 6.0uF 50v. I'd like to replace them with Dayton polypropylene caps, but the closest values I can find are:
  • 6.2uF 200v
  • 2.7uF 200v
  • 3.3uF 200v
My question is, which should I choose to replace the 3.0uF and how drastically will the crossover points be effected?

Thanks!
Dave
 
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Parallel caps of "half" value.

Use a pair of 3's in place of the 6uF cap.

Dayton makes 3.0's available at PE.

EDIT: they're a little pricier, but you can get 3.0's in their hi quality 1% tolerance caps too.
 
bowtie427ss said:
Parallel caps of "half" value.

Use a pair of 3's in place of the 6uF cap.

Dayton makes 3.0's available at PE.

EDIT: they're a little pricier, but you can get 3.0's in their hi quality 1% tolerance caps too.
Click to expand...

A quick question before I run off to work....

Why parallel caps of half value? Why not a 4uf and a 2uf to achieve 6uf?

Is this a NO-NO?
 
Why parallel caps of half value? Why not a 4uf and a 2uf to achieve 6uf?
Click to expand...
Sorry i don't have a technically based answer, rather just some inklings that will just generate more questions.

In a nutshell i like symmetry, and i suspect that in certain cases where the paralleled caps have a big difference in value, a "bypass" effect may occur that would change the sound, maybe in a good way, maybe not.

FWIW, in factory crossovers where i've encountered parallel caps, they've always been of equal value with the exception being "bypass" caps.

Hopefully we'll hear from Ray W, Zilch, Gordon W, or one of our other resiident experts on this, i'm interested in their input on this exact topic.:yes:
 
It doesn't matter.

The "Bypass" effect happens with adding a low value cap; under 0.1 uF, with 0.01 uF typical.... :yes:
 
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