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Alternative, please the inductor in a fully screened mu-metal case. Burklin and many others make them.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Synth-diy <synth-diy-bounces@synth-diy.org> on behalf of Jean-Pierre Desrochers via Synth-diy <synth-diy@synth-diy.org><br>
<b>Sent:</b> 14 June 2024 00:46<br>
<b>To:</b> Synth-diy@synth-diy.org <Synth-diy@synth-diy.org><br>
<b>Subject:</b> [sdiy] Jim Dunlop Cry Baby Wah-Wah.. 500mH inductor replacement with an inductor simulator circuit.. Feasable ??</font>
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<p class="x_MsoNormal">Hi list,</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">I have a guitar pedal board that uses 8 pedals.</p>
<p class="x_MsoNormal">The first pedal (receiving the guitar) is a Jim Dunlop Cry Baby Wah-Wah.<br>
The following pedal is a switchable overdrive with high gain.</p>
<p class="x_MsoNormal">Then the pedal chain goes on with 6 other pedals to a final tuner that drives a guitar amplifier. Ok.</p>
<p class="x_MsoNormal">4 of these pedals are powered with there separate AC supplies (9VAC, 9VAC, 7.5VAC & 22VAC).</p>
<p class="x_MsoNormal">The other pedals are powered using 9VDC standard BOSS supplies.</p>
<p class="x_MsoNormal">Here is my problem :</p>
<p class="x_MsoNormal">Since the Wah-Wah is connected at the ‘head’ of the pedal chain and uses an internal 500mH inductor in its circuit<br>
it acts like the secondary of a transformer picking up 60Hz</p>
<p class="x_MsoNormal">from all the nearby transformers of the board.<br>
I had to unsolder the inductor from the inside PCB and,</p>
<p class="x_MsoNormal">using short lenghts of wires connected to it … place it in the Wah-Wah housing<br>
at a ‘specific’ place and angle to get the less 60Hz pickup.</p>
<p class="x_MsoNormal">This is annoying.. </p>
<p class="x_MsoNormal">Now I can play with a little back ground hum when the Wah-Wah is activated..<br>
I was wondering if I could use an active inductor simulator circuit</p>
<p class="x_MsoNormal">In place of the 500mH passive inductor.. (??)</p>
<p class="x_MsoNormal">Feasable ??</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Here is the Jim Dunlop Wah-Wah schematic : </p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"><img width="845" height="464" id="x_Image_x0020_2" style="width:8.802in; height:4.8333in" data-outlook-trace="F:1|T:1" src="cid:image001.jpg@01DABDCA.72DA17F0"></p>
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