<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">I'm happy you said this. I had written out a post suggesting to build circuits before trying to optimize resistor noise performance. started sounding like the responses that miss the point and don't answer the op's question, so I deleted it hehe. <div><br></div><div>yours didn't feel this way David, there was context and previous responses. I agree though, and I'm generally very happy when my hardware sounds "old" (usually jusy means noisey heh) I also use whatever value I have the most of on board, which often enough is 100k, with at least the option for caps in parallel with feedback resistors. </div><div><div dir="ltr"><br></div><div dir="ltr">Chris </div><div dir="ltr"><br><blockquote type="cite">On Nov 14, 2020, at 7:13 PM, David G Dixon <dixon@mail.ubc.ca> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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<div dir="ltr" align="left"><span class="910380901-15112020"><font color="#0000ff" size="2" face="Arial">I've actually been accused of designing modules that sound
"too clean" and I use lots of 100k resistors all over the place. This is
one of those problems that probably isn't really a
problem.</font></span></div><br>
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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>Bernard Arthur
Hutchins, Jr<br><b>Sent:</b> Saturday, November 14, 2020 11:36 AM<br><b>To:</b>
synth-diy@synth-diy.org<br><b>Subject:</b> [sdiy] Voltage Feedback Resistors and
Circuit Stability<br></font><br></div>
<div></div><span style="BACKGROUND-COLOR: #ffecb3; COLOR: #000000; FONT-SIZE: 12px"><span style="BACKGROUND-COLOR: #ffecb3; COLOR: #000000; FONT-SIZE: 12px"><span style="PADDING-BOTTOM: 3px; LINE-HEIGHT: 1.6; BACKGROUND-COLOR: #ffecb3; FONT-STYLE: normal; PADDING-LEFT: 3px; PADDING-RIGHT: 3px; COLOR: #000000; FONT-SIZE: 12px; FONT-WEIGHT: normal; PADDING-TOP: 3px">[<strong>CAUTION:</strong>
Non-UBC Email]</span></span></span>
<div style="COLOR: rgb(0,0,0); FONT-SIZE: 10pt">
<p style="LINE-HEIGHT: 107%; MARGIN: 0in 0in 8pt; FONT-SIZE: 11pt" class="MsoNormal"><font face="Arial, sans-serif"> </font><span style="FONT-FAMILY: Arial, sans-serif">AWKWARD Questions </span><o:p style="FONT-FAMILY: Arial, sans-serif; font-variant-ligatures: inherit; font-variant-caps: inherit"> </o:p></p>
<p style="LINE-HEIGHT: 107%; MARGIN: 0in 0in 8pt; FONT-FAMILY: Calibri, sans-serif; FONT-SIZE: 11pt" class="MsoNormal"><span style="FONT-FAMILY: 'Arial',sans-serif"><o:p></o:p></span></p>
<p style="LINE-HEIGHT: 107%; MARGIN: 0in 0in 8pt; FONT-FAMILY: Calibri, sans-serif; FONT-SIZE: 11pt" class="MsoNormal"><span style="FONT-FAMILY: 'Arial',sans-serif">(1) <span style="mso-spacerun: yes"> </span>In a synthesizer with standard
signal levels of +/- 5, has anyone even HEARD Johnson noises, let alone been
able to attribute it to a particular resistance?<span style="mso-spacerun: yes"> </span><o:p> </o:p></span></p>
<p style="LINE-HEIGHT: 107%; MARGIN: 0in 0in 8pt; FONT-FAMILY: Calibri, sans-serif; FONT-SIZE: 11pt" class="MsoNormal"><span style="FONT-FAMILY: 'Arial',sans-serif"><span style="mso-spacerun: yes"> </span><o:p> </o:p></span></p>
<p style="LINE-HEIGHT: 107%; MARGIN: 0in 0in 8pt; FONT-FAMILY: Calibri, sans-serif; FONT-SIZE: 11pt" class="MsoNormal"><span style="FONT-FAMILY: 'Arial',sans-serif">(2) <span style="mso-spacerun: yes"> </span><span style="mso-spacerun: yes"> </span>Given a 100k resistor, how does one
(specific circuit/methodology please) observe/hear its Johnson noise as compared
to a 10k?<o:p> </o:p></span></p>
<p style="LINE-HEIGHT: 107%; MARGIN: 0in 0in 8pt; FONT-FAMILY: Calibri, sans-serif; FONT-SIZE: 11pt" class="MsoNormal"><span style="FONT-FAMILY: 'Arial',sans-serif"><o:p></o:p></span></p><span style="LINE-HEIGHT: 107%; FONT-FAMILY: Arial, sans-serif; FONT-SIZE: 11pt">-Bernie
<span style="mso-spacerun: yes"> </span><span style="mso-spacerun: yes"> </span></span><br></div>
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