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 Forum index » DIY Hardware and Software » YuSynth
Thank you Mr.Yves
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axl



Joined: Oct 28, 2012
Posts: 30
Location: ita

PostPosted: Sun Oct 28, 2012 7:56 am    Post subject: Thank you Mr.Yves
Subject description: Your website inspiring me to built my first modular
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thanks for you job and your passion Yves!
I've start one month ago, I've built a couple of Monimoog Vcf and a wave folder.
Here some picture made with a cheap phone ahahahahah.

Just one question if some one can help me, is it normal the VCF is so noisy???
I have a kind of ground noise around 100hz @ -27Dbfs it's a bit huge right????
I've don't matched the 47n capcan be this the problem??????


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axl



Joined: Oct 28, 2012
Posts: 30
Location: ita

PostPosted: Sun Oct 28, 2012 1:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

I think is something to do with resonance if i disconnect the pot, or move the trim the noise drop down.
if i calibrate the trim the noise go up.....
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Sebo



Joined: Apr 27, 2007
Posts: 525
Location: Argentina

PostPosted: Mon Oct 29, 2012 10:40 am    Post subject: Reply with quote  Mark this post and the followings unread

100Hz is probably hum from the PSU, the hum is worst when you turn up the resonance as the circuit consumes more current. Try a better PSU with more current capacity, or try to connect only the VCF to check if the problem goes away.
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axl



Joined: Oct 28, 2012
Posts: 30
Location: ita

PostPosted: Mon Oct 29, 2012 4:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi sebo,
thanks for the reply!
I've try to connect only the vcf but the problem persist,
If i connect the wavefolder i don't have this problem so i don't think is that but maybe Im'wrong..........
I'm using the 15v psu from curetronic.
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axl



Joined: Oct 28, 2012
Posts: 30
Location: ita

PostPosted: Tue Oct 30, 2012 12:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

PROBLEM SOLVEEEEEEEE!!!!
was one of the 2 capacitor on the power soket
WEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE Razz
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ungleichklang



Joined: Dec 03, 2011
Posts: 70
Location: East-Belgium

PostPosted: Tue Oct 30, 2012 12:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

congrats ... just wanted to answer ..

I have curetronic powersupplies (so meanwell PSUG) too and there is no humming

btw. nice builds and welcome to the modular madness Wink

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greetings from belgium, Sascha

My new blogspot: http://ungleichklang.blogspot.com
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axl



Joined: Oct 28, 2012
Posts: 30
Location: ita

PostPosted: Tue Oct 30, 2012 6:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks mate!
Ye the curetronic psu is pretty cool is'nt???
Is the better i could find online.......
How many module can you run with it???
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ungleichklang



Joined: Dec 03, 2011
Posts: 70
Location: East-Belgium

PostPosted: Wed Oct 31, 2012 12:45 am    Post subject: Reply with quote  Mark this post and the followings unread

axl wrote:
Thanks mate!
Ye the curetronic psu is pretty cool is'nt???
Is the better i could find online.......
How many module can you run with it???


Do you have the older "open" one or the closed (caged) one ...??

You can't say how many modules exactly can be run with a PSU, it all depends on the Ampere it can deliver and the module takes ..

f.e. (easy explanation) :
there are VCF that take 5 mA and others that take 30 mA
the Yusynth Fixed Filterbank takes 70 mA
the one VCO takes 40 mA another takes up to 100mA
Klee and MPS need ~100 mA each
and so on,

it also makes a bit how much it takes on the -15V-Rail and howmuch on the +15V
normally its both the same, but some modules don't

so it all depends on the modules you build

my curetronic-PSU (which is a Meanwell PSAI 24W +15V -15V) will deliver 800mA on each Rail, so I can server about 10 to 15 modules with it ...

I have 4 of those PSAI, so in total about 3.200 mA for each Rail Smile

For the yusynth-modules I found this xls
http://ebookbrowse.com/currents-yusynth-xls-d102712152

Hope this helps a bit (and hope my explanaitions as non-professional are correct)

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greetings from belgium, Sascha

My new blogspot: http://ungleichklang.blogspot.com
My Youtube-Channel: http://www.youtube.com/user/ungleichklang
My old google-site: https://sites.google.com/site/ungleichklang/home/s-diy

Linux Musician
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axl



Joined: Oct 28, 2012
Posts: 30
Location: ita

PostPosted: Wed Oct 31, 2012 6:34 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks for the reply, very clear!
I have the caged version, T-40C it can delivery 1,5A on +15rail and 0.5A on the -15 rail. (on the website is described is 2A for +15 and 1A for -15 but is not true).
How to know how many A i'm using??
Just take my digital amperometer and put the tip on the DC rail ????
thanks for the reply.

Just to know isn't better to use a big toroidal psu instead of 4 small one????
Just asking beacouse some time i've see inside some hi-end pro equipment (like API SSL and NEVE stuff) and alwis see big oversized toroidal psu
alex
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ungleichklang



Joined: Dec 03, 2011
Posts: 70
Location: East-Belgium

PostPosted: Fri Nov 02, 2012 12:59 am    Post subject: Reply with quote  Mark this post and the followings unread

axl wrote:

How to know how many A i'm using??
Just take my digital amperometer and put the tip on the DC rail ????


I think that is the best way, else you only can assume how much it is and keep it in mind if any weird things happen after adding a new module ...

axl wrote:

Just to know isn't better to use a big toroidal psu instead of 4 small one????
Just asking beacouse some time i've see inside some hi-end pro equipment (like API SSL and NEVE stuff) and alwis see big oversized toroidal psu
alex


I bought the PSAI cause it has same mA on both Rails, plus I might decide (already have decided) to build another cabinet (2nd and 3rd), then I can split them up or ....
I don't know => will see then Wink

_________________
greetings from belgium, Sascha

My new blogspot: http://ungleichklang.blogspot.com
My Youtube-Channel: http://www.youtube.com/user/ungleichklang
My old google-site: https://sites.google.com/site/ungleichklang/home/s-diy

Linux Musician
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