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 Forum index » DIY Hardware and Software » Jürgen Haible designs
Voltage controlled version of Moog Parametric Equalizer?
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macumbista



Joined: Sep 12, 2007
Posts: 360
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PostPosted: Thu Dec 10, 2009 7:10 am    Post subject: Reply with quote  Mark this post and the followings unread

And in case you were wondering, the Google translation of the page is actually quite good! Wink
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Esoteric drones and nonlinear distortion
Custom/handmade experimental instruments
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yusynth



Joined: Nov 24, 2005
Posts: 1221
Location: France

PostPosted: Thu Dec 10, 2009 7:58 am    Post subject: Reply with quote  Mark this post and the followings unread

macumbista wrote:
Would HEIGHT be the resonance of the filter (WIDTH?) or the gain?

Yes it's a gain control. You may chain any number of these.

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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Thu Dec 10, 2009 12:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

yusynth wrote:
I think this may be of interest for some of you :
http://www.acoupel.com/Modules_Analogiques/acs_parametric.htm

It is in French but should be translated into english soon


Ola,tres sympa,merci beacoup

edit:ai,double pot speciale chipotage Wink
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yusynth



Joined: Nov 24, 2005
Posts: 1221
Location: France

PostPosted: Thu Dec 10, 2009 3:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yes there is a double gang pot with different values, but this can be created by using two dual gang pots one of 2x50KLOG and the other of 2x500KLIN. Then one must dismantle/disassemble the dual pots and remount them crossing the values in order to give a dual 50KLOG/500KLIN and a dual 500KLIN/50KLOG
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vtl5c3



Joined: Sep 08, 2006
Posts: 423
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PostPosted: Thu Dec 10, 2009 8:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

The datasheet for these pots indicate that they are modular & stackable.

http://www.piher-nacesa.com/pdf/20-PC16v03.pdf

I'll try to find out more about what's involved in customizing your own pairs.

R.
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a100user



Joined: Oct 28, 2003
Posts: 147
Location: UK

PostPosted: Fri Dec 11, 2009 1:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Ho Hum, another set of PCB's to sit in the cupboard Embarassed

Yes please Jurgen
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Fri Dec 11, 2009 2:12 am    Post subject: Reply with quote  Mark this post and the followings unread

vtl5c3 wrote:
The datasheet for these pots indicate that they are modular & stackable.

http://www.piher-nacesa.com/pdf/20-PC16v03.pdf

I'll try to find out more about what's involved in customizing your own pairs.

R.


Piher pots are the most crappy pots human being may buy,after a few weeks they already start getting scratchy
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Funky40



Joined: Sep 24, 2005
Posts: 875
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PostPosted: Fri Dec 11, 2009 8:46 am    Post subject: Reply with quote  Mark this post and the followings unread

TekniK wrote:
vtl5c3 wrote:
The datasheet for these pots indicate that they are modular & stackable.

http://www.piher-nacesa.com/pdf/20-PC16v03.pdf

I'll try to find out more about what's involved in customizing your own pairs.

R.


Piher pots are the most crappy pots human being may buy,after a few weeks they already start getting scratchy

is there anything worser than the Radiohms from reichelt ? can't belive Wink

lets say each person must take 20 pots, then it would take 50 people to get to a number of thousand.
is 1000 not the break to get your own pots manufactured ?
What i remember from a call with banzai this is.
sounds not impossible to me to get to this number

hmm, but this is the haible thread.in respect we should change to a own one.
Finally i'm not in hurry. next winter is a good time for me for a EQ.

the idea to get pots manufactured might also be from sense for Jürgens project btw. ( if thats a need )
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vtl5c3



Joined: Sep 08, 2006
Posts: 423
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PostPosted: Fri Dec 11, 2009 10:37 am    Post subject: Reply with quote  Mark this post and the followings unread

I did not know that Piher had such a bad reputation. I can't say that I've used their pots before. I was interested because they claim the pots are modular, but it looks like that modularization is not in the end user's hands, but at the factory.

Ultimately, it might make sense to wait for Juergen to publish his version. It proabably won't require custom pots.
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Fri Dec 11, 2009 10:44 am    Post subject: Reply with quote  Mark this post and the followings unread

the problem with those black plastic pihers ,is that when they crash u cannot spray them properly,u are beter then with radio ohm or the metal carbon pihers because these u can spray.

also for an starter in diy the plastic pihers are not recommended,if u warm the lugs to long it fucktup the track of the pot,i know it because i did use these when i started with diy Laughing

the fun part is that iv seen those metal pihers offered sometimes at higher price as a quality pot
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jhaible



Joined: May 25, 2007
Posts: 2014
Location: Germany
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PostPosted: Fri Dec 11, 2009 10:49 am    Post subject: Reply with quote  Mark this post and the followings unread

The Radiohm's from Reichelt are bad, but the Piher PC16 are abysmal. I think there wasn't a single one that didn't turn scratchi within 6 months, when I tried them. (That was many years ago, admittetly, but then I was burnt for life.)

JH.

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