MS20 Filter

[Stewart Pye]

Hi Keith

>For the .002 caps (I presume .002uF) I have used 2200pF multilayer resin
dipped 
>plate ceramic caps and for the 10u I have used electrolytics cans.

** If they are .002uF, you should use 2200nF not 2200 pF. If you used
2200pF the cutoff frequency will be much higher than desired. Ceramic caps
should work okay.

Hope this helps.

Stewart Pye.
BTW, I have not built this circuit.


At 08:41 AM 25/06/99 +0100, Keith Winstanley wrote:
>In-Reply-To: <memo.212887 at cix.compulink.co.uk>
>> Hi,
>> has anyone built the MS 20 filter from 'Tom's Synth Cookbook' on the 
>> Electronics  for Musicians web site?
>
>sorry that is the Electronics For Music web site:
>
>http://www.mindspring.com/~vco/cbook/cookbook.html
>
>
>I have used 4148 diodes maybe thats the problem?

>
>any comments?
>....Keith Winstanley
>
>
>
>
>
>> I have built one as a dual HP/LP filter and while I am getting a signal 
>> through the filtering is very weedy as is the resonance, I can hear the 
>> circuit working in some way but there is obviously something awry. I have 
>> already corrected the leg configuration on the 2N3906 although it caught
me 
>> out to begin with.
>> I am wondering if I am using the correct type of caps?
>> If anyone has any experience of this project and has any tips please let
me 
>> know.-
>