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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Hi list,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a guitar pedal board that uses 8 pedals.<o:p></o:p></p><p class=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.<o:p></o:p></p><p class=MsoNormal>Then the pedal chain goes on with 6 other pedals to a final tuner that drives a guitar amplifier. Ok.<o:p></o:p></p><p class=MsoNormal>4 of these pedals are powered with there separate AC supplies (9VAC, 9VAC, 7.5VAC & 22VAC).<o:p></o:p></p><p class=MsoNormal>The other pedals are powered using 9VDC standard BOSS supplies.<o:p></o:p></p><p class=MsoNormal>Here is my problem :<o:p></o:p></p><p class=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<o:p></o:p></p><p class=MsoNormal>from all the nearby transformers of the board.<br>I had to unsolder the inductor from the inside PCB and,<o:p></o:p></p><p class=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.<o:p></o:p></p><p class=MsoNormal>This is annoying.. <o:p></o:p></p><p class=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<o:p></o:p></p><p class=MsoNormal>In place of the 500mH passive inductor.. (??)<o:p></o:p></p><p class=MsoNormal>Feasable ??<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here is the Jim Dunlop Wah-Wah schematic : <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img width=845 height=464 style='width:8.802in;height:4.8333in' id="Image_x0020_2" src="cid:image001.jpg@01DABDCA.72DA17F0"><o:p></o:p></p></div></body></html>