Vintage Simmons Drums (UK) Users Group

> My problem with using "special purpose" IC's
> is that at some point they become vary hard 
> to find and if the need replace becomes an 
> issue thats where the pain starts.  If a 
> design can be kept to using readily available 
> components, this situation can be averted. 


Agree 100%.  Anything new built with discontinued 
parts limits product life and uses up spares.


Why not just build a Moog ladder filter?  It's 
in the right family and uses discrete parts.
Might become a new classic.

> The ones from hongkong do indeed work my opinion


And maybe they'll stop people buying up broken
Siel synths and ripping out the filter chips.
Pure vandalism.



Steve (drifting off topic)