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 Forum index » DIY Hardware and Software » YuSynth
Problem with the Steiner Parker Filter
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Audioscape



Joined: Feb 11, 2014
Posts: 2
Location: Germany

PostPosted: Tue Feb 11, 2014 11:37 am    Post subject: Problem with the Steiner Parker Filter
Subject description: Self oscillation Problem
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Hi!

I have the following Problem:

-The Resonance is set on self oscillation. (No Input Signal)

When i set the Frequency now under 150-160 Hz the Signal breaks down.
no Level.

I used this shematic.

http://www.yusynth.net/Modular/index_en.html

Someone has an idea?


Best regards!

M.
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Sebo



Joined: Apr 27, 2007
Posts: 564
Location: Argentina

PostPosted: Tue Feb 11, 2014 4:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

That's normal, not all VCFs oscillates in the full frequency range.
I built the Steiner-ParkerVCF, the MiniMoog VCF, the ARP 4072 VCF, the VCS3 VCF, the WASP VCF, the Polivoks VCF, the Sytem 100m VCF, and the MS-20 VCF. The ones that self oscilate in the full frequency range are the ARP 4072, the Sytem 100m and the MS-20. The rest only oscillates for a limited range.

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