Anyone Who Knows Anything about the Schaller Bow Wow Yoy Yoy...

Paul Marossy · August 09, 2006, 12:10:07 AM

I have a question. The one schematic that I could find on the web is apparently no longer available, but I pinted it out - and it has one 100K reverse log pot indicated on it. But, I just saw a couple of pictures where there is clearly a dual pot in the pedal, in which case the schematic indicating a single pot is either showing an early version (V1?) or is incorrect.

Can anyone shed some light on this? I'm asking because I built the circuit per the one schematic that I could find, but it doesn't really sound much like what I think it should sound like. This dual pot thing has me really curious now...

reverberation66 · August 09, 2006, 12:18:04 AM

sorry, I don't have any info. on this, is there any way you could post a schematic or link to one? I've never seen one and I'd like to give than one a try.

Crawf · August 09, 2006, 01:21:32 AM

Hi, Hope this works, this is the inside of a Schaller Wha Wha-Yoy Yoy pedal, it might be the same as the one you have mentioned

http://img220.imageshack.us/img220/2259/dscf0004rk5.jpg

radio · August 09, 2006, 01:21:38 AM

Hi

I had a problem with a schaller phaser pedal.

So I emailed them for the schematic,and I got

it next day in my inbox.

http://www.schaller-guitarparts.de/contact.htm

Greetings JMErnzer

alfafalfa · August 09, 2006, 05:33:36 AM

Paul I sent you some info by regular mail.
You might find it useful.

Alf

hilbi · August 09, 2006, 07:13:50 AM

http://www.diystompboxes.com/pedals/schall.gif

Just found this with search function of this forum, maybe it is of any help.

Phorhas · August 09, 2006, 07:41:08 AM

PM me your E-mail and I'll send you the stuff that schaller sent me

snap · August 09, 2006, 08:56:07 AM

http://filters.muziq.be/model/schaller/whawha

there probably was a dualpot volume plus wah version?

Mark Hammer · August 09, 2006, 10:31:01 AM

Quote from: snap on August 09, 2006, 08:56:07 AM
http://filters.muziq.be/model/schaller/whawha

there probably was a dualpot volume plus wah version?

That's what it looks like. I've had/used two different ones in my lifetime, and I honestly don't remember them sounding any different from each other. The thing is, I never looked inside them, so I have no idea if they were single or dual-ganged pot versions.

As Paul notes, I don't think I've ever seen a dual-pot schem posted. Only the single pot version, although from the pictures both have dual inductors..

DiscoFreq · August 09, 2006, 11:09:26 AM

Quote from: Mark Hammer on August 09, 2006, 10:31:01 AM
That's what it looks like. I've had/used two different ones in my lifetime, and I honestly don't remember them sounding any different from each other. The thing is, I never looked inside them, so I have no idea if they were single or dual-ganged pot versions.

*very surprised*

Paul Marossy · August 09, 2006, 03:07:50 PM

QuoteJust found this with search function of this forum, maybe it is of any help.

Yeah, hilbi, that's essentially the same schematic as the one I have in my wah notebook. (yes, I have an entire 3-ring binder filled with various wah schematics and info!)

QuotePaul I sent you some info by regular mail.
You might find it useful.

Thanks alfalfa! That schematic that you sent me appears to be for a fuzz wah. I bet that is the difference - the dual pot version is a fuzz-wah and the single pot version is the "Bow Wow Yoy Yoy". What do you think?

QuoteAs Paul notes, I don't think I've ever seen a dual-pot schem posted. Only the single pot version, although from the pictures both have dual inductors..

Yep, Mark, all versions appear have two inductors. But not all versions use a dual pot. As I mentioned above, I think the fuzz wah has dual pots and is marked "wau-wau". All I need to do is verify that...

Paul Marossy · August 09, 2006, 05:49:00 PM

Actually, I've been thinking. I don't think that it's correct to say that the version with a dual pot is a fuzz wah - you wouldn't be able to adjust the amount of fuzz and use the wah at the same time, at least I don't think so. Perhaps the fuzz on/off switch somehow switches which pot is active?

If it were a wah/volume pedal, I don't see why it would need two pots - I mean any other wah/volume pedal that I have seen only uses a single pot. This is rather perplexing...

Paul Marossy · August 17, 2006, 10:35:17 AM

BTTT, just in case someone might have the answer to this mystery...

SISKO · August 17, 2006, 11:54:01 AM

Hi.
Well, i had one, and i DEFINITELY CAN TELL YOU, that it uses a single pot and this schemo http://www.diystompboxes.com/pedals/schall.gif is correct. In fact, i reverse engineer mine and it was the same circuit.
Hope it was usefull

ROCK ON
SISKO

Paul Marossy · August 17, 2006, 12:02:54 PM

Thanks SISKO.

Dan N · August 18, 2006, 12:06:53 AM

Here are a couple photos from an ebay sale. No extra parts for a fuzz. Dual pot. I can't figure out where the wires are going and what they are doing...

http://users.rio.com/senorris/junk/scha.zip

lvs · August 18, 2006, 09:50:24 AM

The photos Dan refers to, show close (but not full) similarity with the inside of my Wha-Wha/Yoy-Yoy. Mine also has a doubled ganged pot. The 8-lugged Marquardt switch actuated by the rocker provides two choices :
- using the pedal for wha/yoy
- using the pedal as a passive volume (no battery needed)

My *guess* is, one deck of the double ganged pot is used as passive volume, and leaving that out would reduce it to a single pot.

Anyways, there appear to exist some different models, and with different names.

SISKO · August 18, 2006, 10:19:52 AM

Quote from: lvs on August 18, 2006, 09:50:24 AM
Anyways, there appear to exist some different models, and with different names.

Yes, it must be that.
But, i can tell you that mine has 1 pot and it is not a volume pedal. (And the schemo its right

).

ROCK ON
SISKO

Paul Marossy · August 18, 2006, 10:24:23 AM

QuoteThe photos Dan refers to, show close (but not full) similarity with the inside of my Wha-Wha/Yoy-Yoy. Mine also has a doubled ganged pot. The 8-lugged Marquardt switch actuated by the rocker provides two choices :
- using the pedal for wha/yoy
- using the pedal as a passive volume (no battery needed)

My *guess* is, one deck of the double ganged pot is used as passive volume, and leaving that out would reduce it to a single pot.

Anyways, there appear to exist some different models, and with different names.

Well, OK, I think I'm satisfied that there are two versions of the Bow Wow Yoy Yoy - one with wah only and one with a volume pedal added on. That Marquardt switch is a very odd beast! Is it a four pole double throw or something?

lvs · August 18, 2006, 01:32:58 PM

Did a crude test with a screwdriver... shorting the wiper and ground lugs of the assumed volume pot kills the output of the pedal in volume mode. In wah mode, no hearable effect. (But I have not got good ears.)

I wouldn't be surprised to find out that the wah/yoy part of my pedal is similar to Sisko's. Thanks for the diagram btw.

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Anyone Who Knows Anything about the Schaller Bow Wow Yoy Yoy...