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<DIV dir=ltr align=left><SPAN class=545321302-30122017><FONT color=#0000ff
size=2 face=Arial>I've just laid out a quad opamp relaxation oscillator
with four different resistor values (10k, 100k, 1M, 10M) for testing all 12
values of my capacitors to give frequencies in the hundreds of Hz. The
frequency is 1/[2 ln(3) RC], so with this I can quickly and accurately measure
the true capacitance (since I don't trust my DVM) and sort into "within 1%" and
"not within 1%" piles. Then I can build my stupid 90 deg PDNs with
confidence, and without trimmers.</FONT></SPAN></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN class=545321302-30122017>Ah,
the fun of DIY electronics.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial></FONT><BR></DIV>
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<FONT size=2 face=Tahoma><B>From:</B> Synth-diy
[mailto:synth-diy-bounces@synth-diy.org] <B>On Behalf Of </B>p.
hendricks<BR><B>Sent:</B> Friday, December 29, 2017 5:34 PM<BR><B>Cc:</B>
'SDIY'<BR><B>Subject:</B> Re: [sdiy] Where to buy ceramic
caps<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=moz-cite-prefix>On 12/29/17 4:36 PM, David G Dixon wrote:<BR></DIV>
<BLOCKQUOTE cite=mid:CB11D014B22C4DAC81CA9C08ECEC6D1B@galvanox01
type="cite"><SPAN class=586373500-30122017><FONT color=#0000ff size=2
face=Arial>Yeah, but I refuse to pay 3 dollars for each one of the
damned things, when they should be 10 cents.</FONT></SPAN></BLOCKQUOTE>
<P><BR></P>
<P>...and a VCA module should be $10, not $70+ when you can get a full synth
for $300.</P>
<P>Buy a million+ and you will get that
price.<BR></P></BLOCKQUOTE></BODY></HTML>