Hi Florian,
Thanks for that:

> I don't have the schemoe of the CEM-Filter-Modules here, but at
> http://www.synthtech.com/cem/cemdata.html you might find the

Datasheet of

> the CEM 3320. There you see four caps with 300pF called Cp; decreasing
> their value will affect the tuning.
>
> There are no data regarding max frequency, but to me it looks like

only the

> first two pages of the datasheet - I remember them longer.

Yeah, I found this site a while back - when I did I was pleased to
find some info on the CEM chips, and then was disappointed by the
amount, they do seem a bit skimpy! When I get more time (and when I
understand filters better!) I'll see if I can work out the transfer
functions of the filters as implemented in A-121, 122, which should
help to provide more insight.

Tim

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