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 Forum index » DIY Hardware and Software » YuSynth
Please help with mouser #s for capacitors in Minimoog VCF
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roman_f



Joined: Jul 03, 2007
Posts: 63
Location: Moscow
Audio files: 1

PostPosted: Sat Sep 03, 2011 2:52 pm    Post subject: Please help with mouser #s for capacitors in Minimoog VCF Reply with quote  Mark this post and the followings unread

Hello again
Please help me, now with mouser #s for capacitors in minimoog filter clone

thank you!
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Mon Sep 05, 2011 7:17 am    Post subject: Reply with quote  Mark this post and the followings unread

Bill and Will at Dragonfly alley publish part lists for the modules they build.
They built Yves diode filter, so perhaps you can use that as a starting point to find the right caps.

Here's a link to the page - the XLS part list is embedded in it...

http://www.dragonflyalley.com/constructionYUSynthEMSDiodeLadder.htm

Gary
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roman_f



Joined: Jul 03, 2007
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Location: Moscow
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PostPosted: Thu Sep 08, 2011 1:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

i did it
but can't find any "47nF matched to 1%"
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Thu Sep 08, 2011 1:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
i did it
but can't find any "47nF matched to 1%"


Hmmm, that's interesting.

I bought the kit from bridechamber so I didn't have to deal with this issue.
The 'matched to 1%' just means that all of the capacitors have to have a value within 1% of each other. Typically you have to buy a bunch of them and choose the 4 that match the best.

There are a few ways I know of to match capacitors.

1) Build a wheatstone bridge (not too hard - google it)
2) Build a simple RC oscillator, and put each capacitor in. Measure the frequency created and use the caps with the closest frequency matches
3) Some Multi-meters can actually measure capacitance.
4) Buy high quality capacitors from the same batch, and hope for the best. With modern manufacturing techniques that might be enough.

There may be someone here who can tell us a better way...

Gary
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roman_f



Joined: Jul 03, 2007
Posts: 63
Location: Moscow
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PostPosted: Thu Sep 08, 2011 3:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

so i'll take say 20 pcs and measure them
it seems that my multimeter (UT39E) can do that
thank you for a tip!
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Thu Sep 08, 2011 6:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
so i'll take say 20 pcs and measure them
it seems that my multimeter (UT39E) can do that
thank you for a tip!


That sounds great - let us know how it comes out.
I really like Yves' boards -very clean design....

Good luck
Gary
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