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 Forum index » DIY Hardware and Software » The layout factory
Buchla 194 Stripboard
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Snaper



Joined: Feb 28, 2014
Posts: 190
Location: Hungary

PostPosted: Fri Jul 11, 2014 1:39 am    Post subject: Reply with quote  Mark this post and the followings unread

Nardu wrote:
Snaper wrote:
.... I've used 860 pF instead of 910 (can't find)....

Use 1.5 nF and 2.2 nF in series = 892 pF.
Depending tolerance you may find a pair to reach the 910 pF value .

Works OK with the 860 pF
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vladosh



Joined: Aug 02, 2010
Posts: 449
Location: macedonia
Audio files: 6

PostPosted: Tue Apr 26, 2016 10:53 am    Post subject: Reply with quote  Mark this post and the followings unread

here's a pcb layout for this filter , i dunno if i'll build this at all but i stumbled across this topic and decided to make a layout for it and here it is , it is 80mm width x 75mm high , print should be 300dpi ,here's a link : https://drive.google.com/open?id=0B3v6ZQI_2r7zYUREOGtFOXpBOXc


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Snaper



Joined: Feb 28, 2014
Posts: 190
Location: Hungary

PostPosted: Tue Apr 26, 2016 10:56 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Vladosh, awesome looking board.
Actually, I've just removed my own 194 from my system. I don't have enough room for new and exciting modules, like my double "Buchlaudino", an Euroduino adaptation Very Happy
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vladosh



Joined: Aug 02, 2010
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PostPosted: Tue Apr 26, 2016 11:06 am    Post subject: Reply with quote  Mark this post and the followings unread

i will prolly never build this filter unless it becomes part of someone else's system i build .. i got a big panel of 15 modules or so to finish for myself and this is no part of it
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vladosh



Joined: Aug 02, 2010
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PostPosted: Tue Apr 26, 2016 11:07 am    Post subject: Reply with quote  Mark this post and the followings unread

this pcb takes lot less space if you look it on a very tiny cellphone
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LFLab



Joined: Dec 17, 2009
Posts: 348
Location: Rosmalen, Netherlands

PostPosted: Tue Apr 26, 2016 11:47 am    Post subject: Reply with quote  Mark this post and the followings unread

I layed out a board for this as well, and also built a module out of it, but yeah, not enough feature density. Meaning to redo this with VCA's after each band or so to give it a bit more versatility.
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Snaper



Joined: Feb 28, 2014
Posts: 190
Location: Hungary

PostPosted: Tue Apr 26, 2016 1:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

LFLab wrote:
I layed out a board for this as well, and also built a module out of it, but yeah, not enough feature density. Meaning to redo this with VCA's after each band or so to give it a bit more versatility.

The vca is a very good idea actually..
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vladosh



Joined: Aug 02, 2010
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PostPosted: Wed Apr 27, 2016 1:24 am    Post subject: Reply with quote  Mark this post and the followings unread

you can use Haible's filter scanner to sweep thru the 4 channels


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LFLab



Joined: Dec 17, 2009
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PostPosted: Wed Apr 27, 2016 3:09 am    Post subject: Reply with quote  Mark this post and the followings unread

An interesting idea!
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vladosh



Joined: Aug 02, 2010
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PostPosted: Fri May 20, 2016 1:18 am    Post subject: Reply with quote  Mark this post and the followings unread

here's an attempt for that Jurgen's scanner , i have no way to proto - this ,and test things so i just layout the board with two variations for output , one is with TL071 and is ,or can be identical to the output of the big interpolating scanner from Jurgen , the other option using TL074 which i kind of hope might work is simpler without offset trimpot and is borrowed from a version of Moog VCF ,all this is untested , the matched pairs are BCM


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