[sdiy] Looking for 2164 12db/oct slopes bandpass filter design.. more detailed..

David Moylan dave at westphila.net
Tue Mar 11 00:09:12 CET 2014


This is cool.  Is there a reason you didn't go for the 13700?


On 03/10/2014 03:49 PM, The Old Crow wrote:
>    I just got done proofing the production version of my MOTM-480 CS-80
> filter MkII, which uses V2164s in place of the late and lamented
> CA3280s.  It is much quieter while using fewer parts.  I'll have DIY
> info for the 5U/MU-panel bare boards out soon.
>
>    There is a thread on muff's about it,
> http://www.muffwiggler.com/forum/viewtopic.php?t=85620
>
> (thanks to Tom Wiltshire, David Dixon, Olivier Gillet and Robert Rich
> for suggestions and remarks over the past year!)
>
> --Crow
> /**/
>
> On 3/10/2014 9:48 AM, Neil Johnson wrote:
>> Jean-Pierre Desrochers wrote:
>>> I'm looking for a 2164 based  bandpass filter design
>>> Built with one separate 2 poles lowpass (12db/oct) (2164 section #1+2)
>>> In series with one separate 2 poles highpass (12db/oct) (2164 section
>>> #3+4).
>>> These 2 blocks in series  make it possible to feed 2 separate &
>>> different
>>> cutoff CV's
>> This is, amongst other things, similar to the Yamaha CS-80 voice
>> structure.  See point #2 here:
>>    http://users.ece.gatech.edu/~lanterma/ems11/projectideas_sp11.html
>>
>> Neil
>>
>
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