Lin detune,MS20 Core,Polysix/Trident

[The Old Crow]

On Thu, 19 Oct 2000 WeAreAs1 at aol.com wrote:

> In a message dated 10/19/00 10:28:44 AM, oldcrow at oldcrows.net writes:
>
> Hello Scott,
> 
> So, do you think the reason that the Trident VCO's work so well (with regard 
> to soft-sync immunity) is mainlydue to careful PC board layout, and not 
> because of the actual circuit design?

  It is both.  :)  See for yourself:

  Here are scans of the KLM-301 schematic and PCB layout from a mark 1
trident.  The bottom layer is barely visible, but enough of it exists on 2
VCO clusters to see what they did.  Note the serpentine ground underneath
the op-amps.  In addition there is a "ground plane board" mounted on
standoffs over the VCOs.  I'll take a picture of this inside the mkII.

  Note: these files are big out of necessity.

  VCO schematic:  (412K)

http://www.oldcrows.net/~oldcrow/synth/korg/tri_mki/KorgTrident_6.GIF

  VCO PCB: (1M)

http://www.oldcrows.net/~oldcrow/synth/korg/tri_mki/KorgTrident_14.GIF

Crow

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