Dotcomformat

--- In dotcomformat@yahoogroups.com, "Dana Countryman" <dana@d...> wrote:
<snip>
> Has anyone here tried to build the ARP filter?:
> http://www.arptech.synth.net/pdf/4012.pdf
> 
> I guess my questions are:
> 
> 1) Has anyone done a side by side comparison of the Arp filter vs. 
> the Dotcom Filter...?
> 
> 2) Would it worthwhile to have this filter?
> 
> and 
>
> 3) Can one still get the semiconductors needed for this circuit?
> 
> I'm always looking for a new sound that I can't get currently...
> 
>  - Dana
>

Dana, I can't address #1 or #2.  However, I did some searching for the
TZ-81 transistors and the AD3958 dual FET.  No such beasts available.
 In fact, I can't even find data sheets for them!  It is entirely
possible that the 'TZ-81' is an internal ARP designation for some
otherwise standard transistor, but since I'm not an ARP tech, I don't
know.  I suspect that buiding this particular filter would prove VERY
difficult.  Given the number of filters currently available from other
sources, I'd stick to getting current releases and re-formatting them
(like you are doing with the Blacet).

I'm curious if anyone has tried any of the Club-Of-The-Knobs filters
to see how they compare to the DotCom/Moog?  What about re-formatting
of Doepfer/Analogue Solutions/... EuroRack modules?

Larry T.