Boss - FW-3 Foot Wah  [schematic]

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

borislavgajic wrote:http://nicosonic.free.fr/schems/BossFW3.pdf

thanks.....first time I see this schem :thumbsup
now it is complete
boris
There's more goodies there:

http://nicosonic.free.fr/schems/
Sorry. Plain out of planes.

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Post by Gila_Crisis »

well to me this wah looks like the classic vox/dunlop design, with a Q pot insted of the fixed 33k in parallel with the inductor and the boss flip-flop bypass.
nothing new :P
Zwischen Ordnung und Chaos fangt die Musik an

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OC26
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Post by OC26 »

Yes, nothing new. Just interesting to see it was nothing new...

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Post by Nyquist5 »

Glad to see my newly scanned schems ar useful to somebody! :wink:

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Post by Dirk_Hendrik »

Nyquist5 wrote:Glad to see my newly scanned schems ar useful to somebody! :wink:
:mrgreen:

Good to see you here. Especially thanks for the factory TK999 schem. Good to see which errors I made and which I need to verify!
Sorry. Plain out of planes.

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Post by OC26 »

Nyquist5 wrote:Glad to see my newly scanned schems ar useful to somebody! :wink:
Very usefull. Enchanté!

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borislavgajic
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Post by borislavgajic »

borislavgajic wrote:yes......regular boss switch......inductor wah (cry baby)....fet transistor before it(the signal is allways going through it ....no true bypass)........and transistor after it...like in all boss pedal's........and one trranny for power supplie.....(sorry for my poor english :shock: )

I traced schematic ....10 years ago .......so I'l have to find it.........give me day or two!!!

so it is nothing new....but it was before crybaby's add on modifications( buffer).......and becouse of that ,it is interesting to see................
I could ask my friend to give it to me for better gut shoots, but he is paranoic,he thinks that I took some parts out of it, and that sweep is reversed( after I traced it) :slap:

boris

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borislavgajic
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Dipthonizer,seekwah,Talkingpedal,morleywha
...soulpreacher,dynacomp,compulator
...buzzaround,fuzzfactory,screwdriver,sho,superdouper,St-9,RogerMayer octavia,Tychobrahe octavia,paralelluniverse,string damper,slowgear
...CE-2,ibanez fL301,EH theCloneTheory
EHX bassmicrosynth,EHX EnglishMuffin,Tube Phaser,springtubereverb ,greyDOD,FulldriveII mosfet,OCD,VOX repeat percussion,RingStinger,Meatball,12stage phaser....
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Post by borislavgajic »

find some guts on net........
Attachments
www.pedalarea.com 2012-1-27 12-51-32.png
www.pedalarea.com 2012-1-27 12-48-30.png
www.pedalarea.com 2012-1-27 12-48-30.png (306.48 KiB) Viewed 911 times

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asatbluesboy
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Post by asatbluesboy »

borislavgajic wrote:
borislavgajic wrote:I could ask my friend to give it to me for better gut shoots, but he is paranoic,he thinks that I took some parts out of it, and that sweep is reversed( after I traced it) :slap:

boris
Tell your friend it should be treble at toe down. I own one--surprisingly stock... :shock:
...collectors together and emitter to base? You're such a darling...

ton.

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borislavgajic
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Dipthonizer,seekwah,Talkingpedal,morleywha
...soulpreacher,dynacomp,compulator
...buzzaround,fuzzfactory,screwdriver,sho,superdouper,St-9,RogerMayer octavia,Tychobrahe octavia,paralelluniverse,string damper,slowgear
...CE-2,ibanez fL301,EH theCloneTheory
EHX bassmicrosynth,EHX EnglishMuffin,Tube Phaser,springtubereverb ,greyDOD,FulldriveII mosfet,OCD,VOX repeat percussion,RingStinger,Meatball,12stage phaser....
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Post by borislavgajic »

asatbluesboy wrote:
borislavgajic wrote:
borislavgajic wrote:I could ask my friend to give it to me for better gut shoots, but he is paranoic,he thinks that I took some parts out of it, and that sweep is reversed( after I traced it) :slap:

boris
Tell your friend it should be treble at toe down. I own one--surprisingly stock... :shock:

I told him........but you know :slap: ...some people are just different.....suspicious ...paranoic..... :whappen: :D

My clone worked better ... :thumbsup

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borislavgajic
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Dipthonizer,seekwah,Talkingpedal,morleywha
...soulpreacher,dynacomp,compulator
...buzzaround,fuzzfactory,screwdriver,sho,superdouper,St-9,RogerMayer octavia,Tychobrahe octavia,paralelluniverse,string damper,slowgear
...CE-2,ibanez fL301,EH theCloneTheory
EHX bassmicrosynth,EHX EnglishMuffin,Tube Phaser,springtubereverb ,greyDOD,FulldriveII mosfet,OCD,VOX repeat percussion,RingStinger,Meatball,12stage phaser....
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Post by borislavgajic »



:thumbsup works nice with dist.......

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Fredenando
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Post by Fredenando »

A friend has give me a Boss FW-3 pedal that have a problem. The internal pot for the wah function has been lost. I have found that this is a small 100k slide potentiometer.

My question is if anybody can help me to find a replacement, because I can't find it in the Roland/Boss official service in my country.

Thank you so much!!

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Post by apollomusicservice »

If you are looking for original part, original ordering code for this pot is
13339318 RS15111F9 100kD.
It means that is reverse logarithmic potentiometer.

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Post by karul »

Dirk_Hendrik wrote:
borislavgajic wrote:http://nicosonic.free.fr/schems/BossFW3.pdf

thanks.....first time I see this schem :thumbsup
now it is complete
boris
There's more goodies there:

http://nicosonic.free.fr/schems/
This is the new address - you can find the schematic over there:
http://www.nicosonic.com/downloads_arti ... schematics
Attachments
BOSS FW3 schematic
BOSS FW3 schematic

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Fredenando
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Post by Fredenando »

Definitely impossible to find this potentiometer in my country. I do not know that I can do to get or replace or any that can adapt, so I have no choice but to ask you again if you can help by giving me some idea or solution that serves to make an adaptation to return it to operate.

Thank you to all!!

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