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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
CGS49 Wasp Filter and self-oscillation
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Flareless



Joined: Jan 16, 2016
Posts: 27
Location: Ontario, Canada
PostPosted: Fri Apr 21, 2017 3:02 am    Post subject: CGS49 Wasp Filter and self-oscillation Reply with quote  Mark this post and the followings unread
There appears to be a modification for the A-124 version of the Wasp filter which allows it to self oscillate (Soldering a 10k resistor in parallel to R13 (27k).

I was wondering if a similar modification was possible with the CGS49 and if so how it was done.
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donpachi



Joined: Jul 16, 2009
Posts: 81
Location: Marburg
Audio files: 2
PostPosted: Sat Apr 22, 2017 1:28 am    Post subject: Reply with quote  Mark this post and the followings unread
I think the A-124 mod lowers the resistance of the feedback path, and I guess doing a similar thing to the 33K resistor connected to the resonance pot of the CGS49 circuit will achieve similar results. Using a 10K trimmer to put in parallel with the resistor will make the maximum feedback level adjustable. Haven't tried this yet myself, though! HTH
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