<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">+1 agree. I'd start by looking at some of the *other* pedals to see how many could be converted to standard 9V centre-negative, and then reduce the number of transformers to reduce the noise.<div class=""><br class=""></div><div class="">You could also check that the wah body is properly grounded. If it is, the inductor should be pretty well shielded - those dunlop wah pedals are in a big cast metal enclosure, right?</div><div class="">
<div><br class=""></div><div>Finally, is this an old or a new Crybaby? The old ones are notorious for tone suck because of the circuit's loading on the guitar. The more modern Crybabies added a buffer at the front to eliminate this problem. You can test this by putting a buffer (or a buffered pedal like one of the boss boxes) in front of the wah temporarily and see if it improves the situation.</div><div><br class=""><blockquote type="cite" class=""><div class="">On 14 Jun 2024, at 07:39, Michael E Caloroso via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">With so many power sources, you may be hearing a ground loop. Never assume that the common return of multiple power sources are all the same potential.<div class=""><br class=""></div><div class="">MC</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 13, 2024 at 10:16 PM brianw <<a href="mailto:brianw@audiobanshee.com" class="">brianw@audiobanshee.com</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">I was going to recommend moving all of the transformers far away from the pedal board, and then run longer power cables for the low-voltage supplies. Although many of your supplies are AC, I'm assuming that there's far more EM coming directly from the transformer windings than from the cables that carry AC power.<br class="">
<br class="">
I'm biased, though, because I always prefer to simplify the power when combining lots of little pedals.<br class="">
<br class="">
Brian<br class="">
<br class="">
<br class="">
On Jun 13, 2024, at 4:46 PM, Jean-Pierre Desrochers wrote:<br class="">
> I have a guitar pedal board that uses 8 pedals.<br class="">
> The first pedal (receiving the guitar) is a Jim Dunlop Cry Baby Wah-Wah.<br class="">
> The following pedal is a switchable overdrive with high gain.<br class="">
> Then the pedal chain goes on with 6 other pedals to a final tuner that drives a guitar amplifier. Ok.<br class="">
> 4 of these pedals are powered with there separate AC supplies (9VAC, 9VAC, 7.5VAC & 22VAC).<br class="">
> The other pedals are powered using 9VDC standard BOSS supplies.<br class="">
> Here is my problem :<br class="">
> Since the Wah-Wah is connected at the ‘head’ of the pedal chain and uses an internal 500mH inductor in its circuit<br class="">
> it acts like the secondary of a transformer picking up 60Hz<br class="">
> from all the nearby transformers of the board.<br class="">
> I had to unsolder the inductor from the inside PCB and,<br class="">
> using short lenghts of wires connected to it … place it in the Wah-Wah housing<br class="">
> at a ‘specific’ place and angle to get the less 60Hz pickup.<br class="">
> This is annoying.. <br class="">
> Now I can play with a little back ground hum when the Wah-Wah is activated..<br class="">
> I was wondering if I could use an active inductor simulator circuit<br class="">
> In place of the 500mH passive inductor.. (??)<br class="">
> Feasable ??<br class="">
<br class="">
<br class="">
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