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 Forum index » DIY Hardware and Software » YuSynth
Yusynth VCLFO2 problem
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yoopee



Joined: Jan 24, 2014
Posts: 3
Location: czech

PostPosted: Fri Jan 24, 2014 2:38 pm    Post subject: Yusynth VCLFO2 problem Reply with quote  Mark this post and the followings unread

hello,
thanks for this wonderful modular diy project.

I'm building few of this modules, now trying to trim the VC LFO2 module.
The pulse and sawtooth waveforms are ok, but triangle and sinus are distorted as you can see on attached screenshots.

I tried to change U3, checked R19,R20,R21,R22,R23,R24, diodes D1,D2
and everything looks ok...

any suggestions what else to check?

thank you

Last edited by yoopee on Fri Jan 24, 2014 2:50 pm; edited 1 time in total
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yoopee



Joined: Jan 24, 2014
Posts: 3
Location: czech

PostPosted: Fri Jan 24, 2014 2:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

uh, I've attached wrong screenshots,these are correct


triangle.PNG
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triangle.PNG



sinus.PNG
 Description:
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sinus.PNG


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marfoski



Joined: Jan 26, 2011
Posts: 25
Location: Italy

PostPosted: Fri Jan 24, 2014 11:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

It's a known quirk of this circuit, something you have to live with, in a sense.
Take a look at this : http://electro-music.com/forum/viewtopic.php?highlight=lfo&t=44023
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yoopee



Joined: Jan 24, 2014
Posts: 3
Location: czech

PostPosted: Sat Jan 25, 2014 6:32 am    Post subject: Reply with quote  Mark this post and the followings unread

thank you! So my VCLFO is trimmed okay...
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kupfer_m



Joined: Oct 14, 2010
Posts: 48
Location: Belgium

PostPosted: Sat Aug 02, 2014 8:46 am    Post subject: Reply with quote  Mark this post and the followings unread

marfoski wrote:
It's a known quirk of this circuit, something you have to live with, in a sense.
Take a look at this : http://electro-music.com/forum/viewtopic.php?highlight=lfo&t=44023


So there's nothing that can be done to get rid of these spikes?
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