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Buchla 190 Dual Reverberator DIY
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Peake



Joined: Jun 29, 2007
Posts: 1113
Location: Loss Angeles
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PostPosted: Thu Nov 07, 2013 1:20 pm    Post subject: Buchla 190 Dual Reverberator DIY
Subject description: NOW CONFIRMED
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Main information page:

http://ebolatone.blogspot.com/2013/11/buchla-190-dual-reverberator-diy.html

This is an updated version, Feb. 21 2016. Working just fine with a clone transformer.

Edit 2018: Zthee/HumanComparator alerted me to an error in the layout. Have uploaded a corrected etch layout reflecting this change.

To mod an existing build, note that the left side of R5 should not go to the - side of C1; it should go to the Base of Q1. One cut, one jump per section.


190 Layout Fix.jpg
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Mod for existing units.
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190 Layout Fix.jpg



190 fix.pdf
 Description:
190 etch artwork including zthee's fix, 2018.

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 Filename:  190 fix.pdf
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Last edited by Peake on Wed Jul 25, 2018 5:57 pm; edited 11 times in total
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Peake



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PostPosted: Fri Nov 15, 2013 9:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm going to attempt an etch in a few days, if anyone who is capable of such might check the original schematics for errors and shout about such here...thank you for any assistance...
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strategy



Joined: Jan 03, 2009
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Location: portland, oregon

PostPosted: Sun Nov 17, 2013 2:23 am    Post subject: Reply with quote  Mark this post and the followings unread

where's the schem?

Peake wrote:
I'm going to attempt an etch in a few days, if anyone who is capable of such might check the original schematics for errors and shout about such here...thank you for any assistance...

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Peake



Joined: Jun 29, 2007
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Location: Loss Angeles
Audio files: 3

PostPosted: Tue Nov 19, 2013 12:52 am    Post subject: Reply with quote  Mark this post and the followings unread

It's at synthfool.com. Thanks for asking/offering but:

I've been given photos of the parts side and trace side of an original module and only have one question about it, and I've sent that to one of the 190 owners who shared with me...will be updating the blog and doing a test etch likely this week although I'm still waiting on a few components. Will know a lot more within two weeks. Main issue: sourcing the obsolete Triad TY-30X transformers, two used per module.

Actually, I've been told the Gates I've drawn up from the 410 schematics don't work correctly. I'll likely be changing them over to original, all-discrete 110 Gates, and hopefully THAT schematic has no errors either!

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"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog
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Peake



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PostPosted: Mon Feb 22, 2016 3:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

This is now a confirmed working clone thanks to a modern audio transformer clone.
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zthee



Joined: Feb 20, 2008
Posts: 414
Location: Stockholm

PostPosted: Sat Mar 12, 2016 4:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

Which transformer did you use?

I've been following you on your blog and on various forums - Fantastic work!

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Peake



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PostPosted: Mon Apr 11, 2016 4:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm rarely here, sorry for the late reply. Sowter created a clone of the original transformer and it works just great!
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