Ladder Filter Blues

[Rick Jansen]

In message <199611181657.AA29336 at ptdi160> you write:
> 
> 
> 
>         Hello everyone!
> 
> 
>       I've got a simple question ... Has anyone built the diode ladder filt
> er
> 
>    that is NOT from the '303 - I think it might be the AKS copy?
> 
>    The reason I ask is because I built it from the schematic from "?'s"
> 
>    (I don't remember his name) homepage, and I can't seem to get it to
> 
>    work quite right - namely, the resonance control doesn't make it self-
> 
>    oscillate, and it isn't very "rezzy" sounding even at high resonance
> 
>    settings! Anyone know of any mistakes in the schematic? Also, if
> 
>    anyone knows which filter I speak of, anybody know of a "common"
> 
>    transistor to use in place of the BC### transistors it calls for?
> 
>    I just used "garden variety" NPN's (2N3904/2N2222), and figure that
> 
>    this *might* be the culprit! ANY information is welcome!!!!


It may have been from my home page, and that filter does work...
Any garden NPN transistor should work in the ladder.

Rick Jansen
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rick at sara.nl   http://www.sara.nl/Rick.Jansen
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S&H's a module and s&h's looking good