<div dir="ltr">I switched to the 2 transistor noise circuit and have had zero issues since. The Future Retro 777 re-release uses that circuit.<div><br></div><div><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sat, Dec 13, 2025 at 8:57 AM Mike Bryant <<a href="mailto:mbryant@futurehorizons.com">mbryant@futurehorizons.com</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">



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<div dir="auto">Thinking back, in the 70s Zener diodes gave better noise than transistors</div>
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<div class="gmail_quote">On 13 Dec 2025 12:52, Mattias Rickardsson <<a href="mailto:mr@analogue.org" target="_blank">mr@analogue.org</a>> wrote:<br type="attribution">
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<div dir="ltr" class="gmail_attr">Den lör 13 dec. 2025 13:34Paul Perry via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a>> skrev:<br>
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<div dir="ltr">Is it possible to simply amplify the thermal noise in a high value resistor?
<div>paul perry Melbourne Australia</div>
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<div dir="auto">And/or the noise of a noisy op-amp in a high-gain setting?</div>
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<div dir="auto">/mr</div>
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</blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Timothy Ressel<div>909-423-5962</div><div>FutureRetro Synthesizers</div><div><br></div></div></div>