[sdiy] Jim Dunlop Cry Baby Wah-Wah.. 500mH inductor replacement with an inductor simulator circuit.. Feasable ??

[Michael E Caloroso]

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.

MC

On Thu, Jun 13, 2024 at 10:16 PM brianw <brianw at audiobanshee.com> wrote:

> 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.
>
> I'm biased, though, because I always prefer to simplify the power when
> combining lots of little pedals.
>
> Brian
>
>
> On Jun 13, 2024, at 4:46 PM, Jean-Pierre Desrochers wrote:
> > I have a guitar pedal board that uses 8 pedals.
> > The first pedal (receiving the guitar) is a Jim Dunlop Cry Baby Wah-Wah.
> > The following pedal is a switchable  overdrive with high gain.
> > Then the pedal chain goes on with 6 other pedals to a final tuner that
> drives a guitar amplifier. Ok.
> > 4 of these pedals are powered with there separate AC supplies (9VAC,
> 9VAC, 7.5VAC & 22VAC).
> > The other pedals are powered using 9VDC standard BOSS supplies.
> > Here is my problem :
> > Since the Wah-Wah is connected at the ‘head’ of the pedal chain and uses
> an internal 500mH inductor in its circuit
> > it acts like the secondary of a transformer picking up 60Hz
> > from all the nearby transformers of the board.
> > I had to unsolder the inductor from the inside PCB and,
> > using short lenghts of wires connected to it … place it in the Wah-Wah
> housing
> > at a ‘specific’ place and angle to get the less 60Hz pickup.
> > This is annoying..
> > Now I can play with a little back ground hum when the Wah-Wah is
> activated..
> > I  was wondering if I could use an active inductor simulator circuit
> > In place of the 500mH passive inductor.. (??)
> > Feasable ??
>
>
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