[sdiy] TC resistor value changes?

[JAMES GALLANT]

Since I'm lazy and usually try to avoid thinking, I'd just put two of 1K the 
tempcos in series or I'd spend the $8 ($13 with shipping if you don't get 
anything else) to get a 2K tempco from Ray Wilson's MFOS.

                      JVG


>From: "dj hohum" <djhohum at gmail.com>
>To: Synth-Diy <synth-diy at dropmix.xs4all.nl>
>Subject: [sdiy] TC resistor value changes?
>Date: Sun, 22 Jul 2007 07:37:19 -0700
>
>Hi All,
>
>I'm building Thomas Henry's XR-VCO and I'm looking at the expo
>converter schematic here:
>
>http://mypeoplepc.com/members/scottnoanh/sitebuildercontent/sitebuilderfiles/schem1.pdf
>
>It calls for a 2k TC resistor. I have only 1k TC resistors. I want to
>make sure I understand what's going on here. If I just put in a 1k
>resistor I'm halving the gain of the opamp. I could compensate for
>this by changing the input resistors from 100k to 50k, yes? Or, I
>could put the 1k TC resistor in series with a 1k normal resistor but
>this then halves the TC value?
>
>Is there any other way to make the substitution, or anything important
>that I'm missing?
>
>I realize that the simple answer is just to order some 2k resistor and
>I might just do that.
>
>Thanks,
>Daryl
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy