<div dir="ltr">Chip ceramic capacitors can show changes in capacitance with bias voltage. If stable capacitance is necessary, then specifying something fundamentally more stable like a polyester might be sensible, albeit at the cost of board area.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 11, 2022 at 2:01 PM Richie Burnett <<a href="mailto:rburnett@richieburnett.co.uk">rburnett@richieburnett.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">> One issue when looking at HF oscillations is sometimes the scope probe<br>
adds enough capacitance or resistance to stop the oscillation...<br>
<br>
Then the "oscillator going SHARP" condition might go away when the probe is <br>
connected!?<br>
<br>
Neil Harper, I guess the VCO does eventually go flat again at some point <br>
higher than a C8 pitch? The pitch errors you mentioned in cents aren't <br>
huge. Does it get worse and worse above the C8 or does it get better again?<br>
<br>
-Richie, <br>
<br>
<br>
-- <br>
This email has been checked for viruses by AVG.<br>
<a href="https://www.avg.com" rel="noreferrer" target="_blank">https://www.avg.com</a><br>
<br>
_______________________________________________<br>
Synth-diy mailing list<br>
<a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br>
<a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature">[s]</div>