Ibanez - WH10-V2 Weeping Demon Wah  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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popper
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popper
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Post by popper »

WH10v2 vs WH10

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popper
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Post by popper »

WH10v2 vs WH10

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azrael
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Post by azrael »

Did you get your Karaluch wah back? I messaged the guy on Facebook, never heard back.

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popper
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Post by popper »

Yes :)


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azrael
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Post by azrael »

Take some pics of the inside! I'm pretty interested in what he did. :)

Especially since he wouldn't reply back to me haha

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popper
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Post by popper »

It's impossible to see used parts because everything is covered by black liquid thing to hide his secret.
I see only additional PCB and places with new parts...but covered.

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Post by azrael »

It may be possible to degoop it. Many people here do it.
viewforum.php?f=55

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prinzollo
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Post by prinzollo »

Any news by the Karaluch Custom guy? I wrote him on facebook too, but no replies yet..

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Post by azrael »

Hahah, I finally got a reply. He said he would not be able to do a kit. Wow, It's February now, I emailed him almost 4 months ago haha.

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frusciante89
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Post by frusciante89 »

sorry for the dumb question guys, I'm trying to learn some electronics...
1) what is the different between Vbias and Vcc in Dirk's schematics?
2) can I remove the dry output section?
3) in the bottom-right part of the schematic, what is the foot-switch referring to? are we using a 3dpt?
4) what is physically sw1.a and sw1.b?
5) what is block of 2 resistors and a capacitor in the middle left doing?
6) where are the third legs of the P1 and P2 pots going?
7) can I put everything on a single faced pcb?

and, more importantly:

8) were can I learn what the different parts of the circuit do in a guitar pedal? I admire how you guys can analyze the difference that a cap or a resistor will do on the circuit, and I'd like to master this ability... I'm an aerospace engineering grad student, and I do studied simple electric circuits, however I have no idea of the effect that different component and component values will have on a circuit...

Thanks for your help,
Andrea :)

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Post by frusciante89 »

Also, what is the dry output section for?

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Post by p.eat »

frusciante89 wrote:sorry for the dumb question guys, I'm trying to learn some electronics...
1) what is the different between Vbias and Vcc in Dirk's schematics?
2) can I remove the dry output section?
3) in the bottom-right part of the schematic, what is the foot-switch referring to? are we using a 3dpt?
4) what is physically sw1.a and sw1.b?
5) what is block of 2 resistors and a capacitor in the middle left doing?
6) where are the third legs of the P1 and P2 pots going?
7) can I put everything on a single faced pcb?
1) Vcc is the supply voltage, in this case 9V. Vbias is sometimes also called Vref and is the virtual ground. It is mostly half of Vcc, so 4,5V

2) Yes, as it feeds its own output

3) Sw2 is refering to the footswitch. I think the original has a DPDT but only one switching element (ebene if you speek german) is used. You can use almost any switch as long as it has at least 1 switching element. SPST, DPDT, 3PDT....

4) Sw1 is a double pull single throw (dpst) switch. Imagine a switch that has two switches inside and both get switched by the same lever

5) See number 3. This network creates Vref.

6) They are not connected. P1 and P2 are used as variable resistances, so only two legs are needed.

7) Sure, why not?

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adielricci
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Post by adielricci »

To whom it may interest, some pictures of my Ibanez WD7 Weeping Demon.

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Post by johnny-guitar »

Hi guys, I just got my WH10v2 but I´m a noob when it comes to schematics :oops: . I can solder and have done stuff on pedals but could anyone shed a light on my doubts. First I know I don't have to remove the resistors completely, just desolder on side, but which one? the one on the trace that goes straight to the switch? do I have to solder the leads directly to the end of the resistors? I appreciate any help on this :mrgreen:

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Post by dai h. »

get some junk PCB to practice on. Search youtube for soldering/de-soldering tutorial videos. Good luck.

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Post by metakel »

Does it get the "pop" sound during switching to and from true-bypass?

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Post by Dirk_Hendrik »

No. It's more a "jazzy" sound.
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

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Post by Duckman »

Dirk_Hendrik wrote:No. It's more a "jazzy" sound.
8) :mrgreen:

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