electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » DIY Hardware and Software » YuSynth
MINIMOOG VCF the cutoff didnt work at all
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
bombomdisco



Joined: Aug 19, 2013
Posts: 1
Location: China

PostPosted: Mon Aug 19, 2013 8:59 am    Post subject: MINIMOOG VCF the cutoff didnt work at all
Subject description: MINIMOOG VCF the cutoff didnt work at all
Reply with quote  Mark this post and the followings unread

HI ,Yves ,i found you guys made MINIMOOG VCF few years ago ,i was so excited to clone it .
Followed your website ,step by step ,i finally finished it .
however , the cutoff didnt work at all .
i've checked too many times and days ,no result :<
EMPHASIS works good it can easily get oscillated by fully clockwise.
And also the output sounds as loud as the original source ,a little bit warmer without distorction .
So Cutoff confuse me alot,could you pliz tell me ,which parts i should check more over again ?
thank you very much
Back to top
View user's profile Send private message
Mongo1



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

PostPosted: Tue Aug 20, 2013 12:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

Start with the simplest things first -

The Cutoff knob should produce a variable voltage on the center pin. Make sure it does. If it doesn't, verify that the other two pins are going where they should

Once that is working correctly, just follow the voltage. There will be an op-amp that sums the control voltages together. Make sure it's output is moving properly. If not, check the +/- power and and the feedback loop on the op-amp.

Just keep following the CV path until you find the problem...

Good luck
Gary
Back to top
View user's profile Send private message Send e-mail
yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France

PostPosted: Wed Aug 21, 2013 4:37 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes, do as Mongo1 says, this is the logical path to follow.
_________________
Yves
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » YuSynth
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use