[sdiy] Thermosistor for XR-2206 Thomas Henry VCO

Christian From christian.from at gmail.com
Fri Sep 21 16:08:00 CEST 2007


2K +3500ppm/C tempco's can be had from magicsmoke.com for...not a lot
of money - can't remember how much...

Christian

On 9/21/07, Matthias.Herrmann at jeppesen.com
<Matthias.Herrmann at jeppesen.com> wrote:
> synth-diy-bounces at dropmix.xs4all.nl wrote on 09/21/2007 02:33:47 PM:
> > The board for the Thomas Henry XR-2206 VCO that Tom Bugs made calls for
> > a 2K +3500ppm/C thermosistor. Where do people (in EU?) source these
> > things? How bad would the drift be if I used a normal 2K resistor?
> >
> > best,
> > d.
>
> since the 2k is placed in the feedbackpath of a inverting amplifier it
> should should be possible to use 1k and divide the value of the input
> resistor (100k) by 2 (=49.9k) to keep the ratio...
>
> cheers,
> matthias
> ___
> www.modular.fonik.de
>
> >
> > --
> > derek holzer ::: http://www.umatic.nl :::
> http://blog.myspace.com/macumbista
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> > "State the problem as clearly as possible"
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