[sdiy] VCO that goes SHARP in highest octaves??

Neil Harper metadata at gmx.com
Wed May 11 00:14:23 CEST 2022



On 5/10/22 05:07, Roman Sowa wrote:
> Are you sure C3 is Class I dielectric (that's C0G for example)?
> All Class II caps (like X7R) show slight dependency of capacitance vs
> frequency. It's not that aparent in audio range, but you say a dozen of
> cents, so it's more or less what could be expected.
>
> Put proper C0G cap and see
>
> Roman


hi Roman, C3 was specced as a Yageo "CAP CER 1000PF 50V C0G/NPO 0805".
but maybe the smt place used something cheaper? i'll swap in one of the
TH tdk's I was using previously and report back.



--
/// Neil Harper
/// Every Wave is New Until it Breaks



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