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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Sun Nov 23, 2008 4:41 am Post subject:
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Great !
Yes it does sound amazing, have fun with it !
Cheers
Yves _________________ Yves |
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Dego
Joined: Apr 22, 2008 Posts: 139 Location: Sweden
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Posted: Tue Jan 06, 2009 6:34 am Post subject:
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Should I match the 2SA798? Does it sound better then? And what type of caps should I use for the matched 470 pf? I have polyester available at home. |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Tue Jan 06, 2009 6:38 am Post subject:
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Dego wrote: | Should I match the 2SA798? Does it sound better then? And what type of caps should I use for the matched 470 pf? I have polyester available at home. |
2SA798 are matched pairs already therefore you don't have to bother about that
If you match the 470 pF caps it's fine but it is not necessary. _________________ Yves |
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Dego
Joined: Apr 22, 2008 Posts: 139 Location: Sweden
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Posted: Tue Jan 06, 2009 10:27 am Post subject:
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Great. I was confused after fast reading of earlier page. I have matched the caps and will finish the filter today. But the panel has to wait |
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Luka
Joined: Jun 29, 2007 Posts: 1003 Location: Melb.
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Posted: Thu Mar 26, 2009 12:46 am Post subject:
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i'm seriously cursed by this deisgn yves, i built another and it is not working. :/
this time my poles are working, my cv section is working however im not getting any output.
i have signal at pin 9 and 10 on the tl074
i am measuring about +13v at pin 8 of the tl074 and not sure where that is coming from. the resonance knob is only putting out about 6-7v or so _________________ problemchild
melbourne australia
http://cycleofproblems.blogspot.com/
http://www.last.fm/user/prblmchild |
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Luka
Joined: Jun 29, 2007 Posts: 1003 Location: Melb.
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Fri Mar 27, 2009 5:12 am Post subject:
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Hi Luka
This was easy fixing this time
Enjoy your filter ! _________________ Yves |
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Luka
Joined: Jun 29, 2007 Posts: 1003 Location: Melb.
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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Posted: Sat May 30, 2009 11:54 am Post subject:
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Yesterday I've finished my ARP filter and I have a dudes about the trimming procedure. I'm not so sure about where I have to measure the voltages for V/Octave tracking.
Someone can explain it? if someone could upload a pictures with the nodes where I have to make the measures will be great. _________________ http://www.corsynth.com |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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Posted: Sat May 30, 2009 1:52 pm Post subject:
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Thanks Yves, I will check it tomorrow , but just tell you that even with no good trimming filter sounds great ,so I can't wait to hear it with good calibration _________________ http://www.corsynth.com |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Sat May 30, 2009 2:03 pm Post subject:
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By the way the voltage values given on my page are indicative, that is they are close to the right setting but then one still has to improve the V/Oct tracking by ear.
I agree this filter sounds sweet and great ! _________________ Yves |
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Funky40
Joined: Sep 24, 2005 Posts: 875 Location: Swiss
Audio files: 1
G2 patch files: 5
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Posted: Fri Jun 19, 2009 11:43 am Post subject:
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My Panel for a second Yusynth ARP clone is ready, gonna solder now the Board.
I might have asked allready but could not found it:
The panel is prepaired to have Insertpoints for the Feedbackpath.
As far as i understand things R43 might be the point to make the insertionpoint.
I guess after R43. Is this a good guess ? |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Funky40
Joined: Sep 24, 2005 Posts: 875 Location: Swiss
Audio files: 1
G2 patch files: 5
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Posted: Sat Jun 20, 2009 11:27 am Post subject:
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Thank you very much Yves ! |
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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Posted: Mon Jul 13, 2009 12:41 am Post subject:
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Hello Yves, I'm writing this just to let you know that I have the chance to make a side to side comparative between your 4072 clone and a Odyssey 4075 filter, that is supposed to be the same filter as the 4072 but this one was used on the 2600.
My conclusion is that you have make a very very very very good job . The overall sound is the same , the only difference that I've noticed is on the resonance but only when you are using an ADSR to modulate the filter frequency ( so probably is due the differences between ADSR responses ). On my 4072 clone I've kept the original resonance response of the ARP 4072 filter. ( R43 suppressed)
I've made this comparative using a Synthesizers.com VCO ( saw and square ) and a ARP Odyssey VCO ( saw and square ) and believe me, if you close your eyes you can not tell which filter you are listening. The filter cut-off has the same response , the sound is the same...
Congratulations for your great job Yves. _________________ http://www.corsynth.com |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Mon Jul 13, 2009 1:11 am Post subject:
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Hi Thalassa
Thank you very much for this blind test. It is very interesting because I designed this "clone" without having the original stuff to compare with and I always wondered if I succeeded or not to capture the essence of this filter. Now I know
Enjoy your ARP filter !
Yves _________________ Yves |
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Tue Jul 14, 2009 1:17 am Post subject:
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Thanks for the praise Thalassa.
I have added your video on my site.
Cheers
Yves _________________ Yves |
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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Posted: Tue Jul 14, 2009 3:04 am Post subject:
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Thanks for that Yves
As you can hear on the video your filter sounds almost the same as the original only slight differences on resonance but you can get the same sound changing a bit the resonance parameter , for example 60% of resonance on the original is not the same as on yours , but even could be due differences between calibrations.
Ps : Thsnk for the ling to my blog _________________ http://www.corsynth.com |
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bonusplays
Joined: Feb 22, 2009 Posts: 4
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Posted: Sun Sep 13, 2009 10:39 am Post subject:
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Just finished wiring up a Bridechamber kit for this filter, plugged it in and nothing! Well, not quite nothing, you see I get a very faint audio signal when the resonance is all the way up and self-oscillating. When I tried turning the trim pots the self-oscillating tone rose or fell depending on what I turned.
I'm pretty confident about my wiring and soldering job (isn't everybody until that's obviously the problem?), so I'm looking for ideas about where to start trouble shooting.
It seems like something is working. Do I maybe just need a new LM3900? Is the signal in not reaching the filter stage? I may just have to wait until I get back my scope and meter in a week or two.
Thanks for making this great filter clone! I'm very eager to have it working. |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Sun Sep 13, 2009 11:01 am Post subject:
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bonusplays wrote: | Just finished wiring up a Bridechamber kit for this filter, plugged it in and nothing! Well, not quite nothing, you see I get a very faint audio signal when the resonance is all the way up and self-oscillating. When I tried turning the trim pots the self-oscillating tone rose or fell depending on what I turned. |
Are all the ground connections soldered ?
bonusplays wrote: | I'm pretty confident about my wiring and soldering job (isn't everybody until that's obviously the problem?), so I'm looking for ideas about where to start trouble shooting. |
have it checked by someone else, we are all blind to our errors !
bonusplays wrote: | It seems like something is working. Do I maybe just need a new LM3900? Is the signal in not reaching the filter stage? I may just have to wait until I get back my scope and meter in a week or two.
Thanks for making this great filter clone! I'm very eager to have it working. |
If you can have an oscilloscope you can check the signal at the various checkpoints listed on the previous page of this thread. It will help diagnosig the problem.
Having a second LM3900 at hand would be great ! _________________ Yves |
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Thalassa
Joined: Jan 27, 2006 Posts: 95 Location: Spain
Audio files: 5
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Posted: Tue Oct 13, 2009 9:38 am Post subject:
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Hello :
I was wondering if there's significant difference between use Wima FKP2 2,5% of tolerance capacitors and the 1% suggested.
I've made mine using the 2,5% but I was going to order a bunch components and I want to know if will be worthwhile to buy the 1% tolerance capacitors. I only found them at farnell and they are quite expensive 1,25€ each.
Pablo _________________ http://www.corsynth.com |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Tue Oct 13, 2009 10:53 am Post subject:
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When I say 1% this means that you may use a bunch 2% or even 5% but that you have to select among them those which are within a range of 1%.
Say you have a dozen of 470pF 5%, you measure the value of each of these and you pick the four capacitors which values are close from each other within 1%, this means that these may be for example 475pF, 473pF, 470pF, 474pF... or even 480pF,485pF,483pF,482pF
What is important is that the four values are close from each other, not that they stick to 470pF _________________ Yves |
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