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Cgs synth

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Re: resistors in series

2009-10-09 by peng3002

--- In cgs_synth@yahoogroups.com, "Guy" <guy@...> wrote:
>

> Amazing to see how far off certain values can be, even with 1% resistors.
>


Well...if the resistor is off more than 1%, it is NOT a 1% resistor.


> And, Ken, how important is it then to get those particular high values exactly right (in the VCO) ? For instance, would a 20M (instead of 22M) be good too ? (for lesser kludginess)
>
>

I would think it would be perfectly fine to use a 20M. For 5% resistors:
22M could actually measure between approx. 21M or 23M and still be in spec. A 20M could measure between 19M and 21M.
22M and 20M are practically the same resistor.

Still unsure? Just try it. CGS boards are very easy to desolder components if needed.

I see a 22M at the input pin 3 of the 3900 for the staircase generator. The other end of the 22M is attached to a trimmer wired between +V and 0V. If I were building this, I would simply use a 10M resistor (since that is the highest value I have) and set the trimmer lower.

p.

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