<html><body><div style="font-size: 12pt; font-family: "times new roman", "new york", times, serif; color: rgb(0, 0, 0);"><div>You can try the mu-metal shield but I bet it will play havoc with the inductor value, so the end result might be unpredictable.</div>
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<div>I think emulating the potentiometer will be harder than fixing the inductor hum issue. A real pot will allow almost any signal level with no distortion.</div>
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<div>I'd fix the power supplies that make the noise rather than try to shield the inductor.</div>
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<div>Harry Bissell</div>
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<blockquote style="margin: 0 0 0 .8em; border-left: 1px #ccc solid; padding-left: 1em;"><hr id="MESSAGE_DATA_MARKER"><strong>From: </strong>Brother <synth-diy@synth-diy.org><br><strong>To: </strong>Michael <mec.forumreader@gmail.com><br><strong>Cc: </strong>rburnett <rburnett@richieburnett.co.uk>; Synth-diy <Synth-diy@synth-diy.org><br><strong>Date: </strong>Tuesday, 9 July 2024 2:50 PM EDT<br><strong>Subject: </strong>Re: [sdiy] Jim Dunlop Cry Baby Wah-Wah.. 500mH inductor replacement .. Found a small professional MuMetal shielded matching transformer @ 530mH on primary..<br><br>
<div dir="ltr"><a href="https://www.amazon.com/VIGORTRONIX-VTX-102-000-SCREENING-MU-METAL-SILVER/dp/B00IWJDCRY/ref=sr_1_7?dib=eyJ2IjoiMSJ9.e59VxqUKT4mFj2PDf59fSAjLES6Q8KWHvdMqBFiJTT3IKATwEOjZQIrWIx9bd0tuLTOrEkX1pftSEjkK9kk1qEmm_8AxqKmqkla41H2GJKNaK7GUu4EITng3fPijZcouN9vrkYJtZCMrLLN_EIt7y27bHvDco1wRsFNhb6SaE9bjwFP2km_hKXmilJQaQEF9552zJPNDR9T7n0mbDpW_fea2M_7fCAl_NJLqPXJ0lMQ.gy_wOcW36qJMWAhgxDn5YTRFRQkEcARvqXZ-TzVz8Io&dib_tag=se&keywords=mumetal&qid=1720550424&sr=8-7" target="_blank" rel="noopener noreferrer">https://www.amazon.com/VIGORTRONIX-VTX-102-000-SCREENING-MU-METAL-SILVER/dp/B00IWJDCRY/ref=sr_1_7?dib=eyJ2IjoiMSJ9.e59VxqUKT4mFj2PDf59fSAjLES6Q8KWHvdMqBFiJTT3IKATwEOjZQIrWIx9bd0tuLTOrEkX1pftSEjkK9kk1qEmm_8AxqKmqkla41H2GJKNaK7GUu4EITng3fPijZcouN9vrkYJtZCMrLLN_EIt7y27bHvDco1wRsFNhb6SaE9bjwFP2km_hKXmilJQaQEF9552zJPNDR9T7n0mbDpW_fea2M_7fCAl_NJLqPXJ0lMQ.gy_wOcW36qJMWAhgxDn5YTRFRQkEcARvqXZ-TzVz8Io&dib_tag=se&keywords=mumetal&qid=1720550424&sr=8-7</a></div>
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<div class="gmail_attr" dir="ltr">On Mon, Jul 8, 2024 at 5:58 PM Michael E Caloroso via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" target="_blank" rel="noopener noreferrer">synth-diy@synth-diy.org</a>> wrote:</div>
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<div dir="ltr">In high school we used to charge the 140H taps in shop class then between classes in the hallways we'd discharge them on the girls' tushies to make involuntary muscle spasms.
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<div>...I'm here the rest of the week...</div>
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<div>MC</div>
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