[sdiy] Re: PAiA 2700 filter

[Scott Gravenhorst]

music.maker at gte.net wrote:
TooManySynths <p8051 at yahoo.com> wrote:
>
>> > Hi all
>> > can anyone pont me towards the worlds simplest
>> resonant filter 
>
>> I would vote the Korg MS20 vcf as a good starter
>> vcf.
>> It's pretty easy to build, no hard to get parts.
>> Only the 
>> expo-trannies need to be matched (or you don't match
>> them at 
>> all, it doesn't make a big difference if you tune
>> the filter 
>> by hand).
>
>No offense, but anything with transisters that need to
>be matched could hardly qualify as the world's
>simplest resonant filter design.
>
>I think what they need is a PAIA 2700 series resonant
>filter, now that is probably the world's simplest. In
>fact, you can probably buy all the parts including
>case knobs and jacks at radio shack for less than $20.
> The schematics used to be online but the last time I
>checked the site they were on, the links were broken.

It took some looking, but they are still on the site.
I just looked there yesterday.  It's in a large PDF 
called 2720.pdf.

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