Rick's ladder filter

[Isac Georg Jensen]

I noticed that someone was questioning about the status of this module,
so I thought I would like to share some of my experiences ...

I've built the ladder filter, based on the schematics in Rick's pages,
and it works just fine (Nice addition to the ASM VCF).
In the first test I had no output, whatsoever, but this was easily
solved by increasing the gain of the final output opamp (A6). I believe
I placed a 8.2k resistor in parallel with R35 (100k), but I'll have to
check that.
Also I replaced the output resitor (R38, 470) to a 1k resistor.

Instead of using Rick's PCB layout I designed my own, which is normal
Eurocard dimensions, and I am willing to share this if anyone is
interested, and there's no legal obstructions to this.

The PCB layout was done using Protels Advanced PCB, (.PCB) and should be
compatible with the easytrax program.

-Isac