[sdiy] Moog filter

[Scott Bernardi]

Here it is:
http://home.attbi.com/~sbernardi/elec/og2/transistor_tester.html

Tim Parkhurst wrote:

> Hi Luis,
>
> Here's one transistor matching circuit and some instructions.
>
> http://www.oldcrows.net/~patchell/matcher/matcher.html
>
> Scott Bernardi used to have a nice circuit on his site, but I can't find it
> anymore. I have it stored on my computer, so I can send it to you privately
> if you'd like. Scott, do you still have this stuff on your site somewhere?
>
> I also have another really nice and simple circuit with a good explanation
> that I can send to you if you'd like. Basically, you are trying to match the
> Vbe of the transistors. This last schematic came from a site with a bunch of
> nice schematics that I can't find anymore. Sorry for being so vague, but I
> think it was posted by Yves Usson. When I go to his site now, I find some
> circuits, but nothing like the extensive list I saw before. This was posted
> only about a month ago. Anyone else remember this?
>
> To make a long story short, I have some stuff I can send you privately if
> you'd like. :)
>
> Tim Servo
> "I'm not lazy, I just lack motive!" - Anonymous
>
> *****************************************************
> > -----Original Message-----
> > From: Luís Marka [mailto:luis.silviano at terra.com.br]
> > Sent: Wednesday, March 19, 2003 11:11 AM
> > To: Synth-Diy
> > Subject: [sdiy] Moog filter
> >
> > Hi all,
> > A quick one: I am going to build a Moog-like 24db filter. This project
> > uses
> > half a dozen 2N3904s in the ladder, and my question is: how do I match
> > transistors?? I don't know what parameter is important to match... VBE?
> > Gain??
> >
> > All my best,
> > Luis Marka
>
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