Dunlop - GCB-95F Crybaby Classic Wah Wah [schematic]
- borislavgajic
- Opamp Operator
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- borislavgajic
- Opamp Operator
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- Posts: 1542
- Joined: 27 Feb 2008, 14:23
- Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
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.... - Location: Sombor , Serbia
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sorry, full name is Dunlop-cry baby Classic......MODEL GCB-95F
so this schematic is not what this PCB looks like
http://www.freeinfosociety.com/electron ... php?id=351
so this schematic is not what this PCB looks like
http://www.freeinfosociety.com/electron ... php?id=351
- johnnyg
- Resistor Ronker
Wow, almost entirely built by machine!
No transistors (opamp instead???); none of that daft mojo whatsoever (other than the fasel perhaps)...
I guess if you owned this new version you couldn't easily mod if for cheap - the relevant thread on here will be made obsolete!
Edit - I missed the transistors there... I'm not used to looking at tiny SMD parts... they look all wrong... where's the mojo in them!
No transistors (opamp instead???); none of that daft mojo whatsoever (other than the fasel perhaps)...
I guess if you owned this new version you couldn't easily mod if for cheap - the relevant thread on here will be made obsolete!
Edit - I missed the transistors there... I'm not used to looking at tiny SMD parts... they look all wrong... where's the mojo in them!
Yet to break through the Space Charge
- borislavgajic
- Opamp Operator
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- Posts: 1542
- Joined: 27 Feb 2008, 14:23
- Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
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.... - Location: Sombor , Serbia
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I think that this wah have nice sound.......never mind that it is all smd......
boris
boris
- johnnyg
- Resistor Ronker
Hmmm, if this crybaby sounds nice straight out the box then I'm very interested... my old one is not so great (and altering this resistor and that resistor has made no great improvement). I've been thinking of removing the pcb from mine and starting from scratch - using what circuit I don't know! There's not been many (not auto) wah wah pedals looked at here (from the searches I've done )... so thanks for the posting Boris I'm curious what differences there might be between this new version and the old ones
Yet to break through the Space Charge
- Dirk_Hendrik
- Old Solderhand
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I encountered that problem a few times recently. Pure stock crybabies performing far better than the ones with all the mojo-tweaks.borislavgajic wrote:I think that this wah have nice sound.......never mind that it is all smd......
boris
- borislavgajic
- Opamp Operator
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- Posts: 1542
- Joined: 27 Feb 2008, 14:23
- Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
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.... - Location: Sombor , Serbia
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I agree with Dirk.......so is there schematic somewhere? ..or I'll have to trace it.......Dirk_Hendrik wrote:I encountered that problem a few times recently. Pure stock crybabies performing far better than the ones with all the mojo-tweaks.borislavgajic wrote:I think that this wah have nice sound.......never mind that it is all smd......
boris
I have better picture of component side...but it'is large....so if somebody want it,send me mail adress......
this is nice demo...
boris
- Dirk_Hendrik
- Old Solderhand
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Yep you will....borislavgajic wrote:I'll have to trace it.......
Too much stuff on the bench to reserve time for tracing...
- borislavgajic
- Opamp Operator
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- Posts: 1542
- Joined: 27 Feb 2008, 14:23
- Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
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.... - Location: Sombor , Serbia
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Dirk_Hendrik wrote:Yep you will....borislavgajic wrote:I'll have to trace it.......
Too much stuff on the bench to reserve time for tracing...
I totally agree with you Mr Dirk
boris
- Dirk_Hendrik
- Old Solderhand
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borislavgajic wrote:Dirk_Hendrik wrote:Yep you will....borislavgajic wrote:I'll have to trace it.......
Too much stuff on the bench to reserve time for tracing...
I totally agree with you Mr Dirk
boris
Sorry. I lied.
Tracing a TOD9 now (maxon). More exciting than the next fuzz or another booster.
- borislavgajic
- Opamp Operator
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- Posts: 1542
- Joined: 27 Feb 2008, 14:23
- Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
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.... - Location: Sombor , Serbia
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more exciting for sure ...it looks great (TOD9)....could you post gut shoots of this pedal please?Dirk_Hendrik wrote:borislavgajic wrote:Dirk_Hendrik wrote:Yep you will....borislavgajic wrote:I'll have to trace it.......
Too much stuff on the bench to reserve time for tracing...
I totally agree with you Mr Dirk
boris
Sorry. I lied.
Tracing a TOD9 now (maxon). More exciting than the next fuzz or another booster.
http://www.maxonfx.com/Nine_TOD9.php
and what about that special power suply? what can you tell us??
thanks
boris
- johnnyg
- Resistor Ronker
Hey Boris, concerning the wah - after searching more than once it seems there is nothing out there on the internet for this circuit. No schematic - and not even any little bits of info about what there might be inside. Just silence and secrecy! I'm sorry I cannot help you trace it - that is beyond me with a pcb like that
Yet to break through the Space Charge
- Dirk_Hendrik
- Old Solderhand
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johnnyg wrote:Hey Boris, concerning the wah - after searching more than once it seems there is nothing out there on the internet for this circuit. No schematic - and not even any little bits of info about what there might be inside. Just silence and secrecy! I'm sorry I cannot help you trace it - that is beyond me with a pcb like that
What I see is the classic Crybaby topology with an added opamp. Seems like a input stage starting at C6. Probably with an output amplifier as well.
- johnnyg
- Resistor Ronker
Thanks Dirk_Hendrik. I was guessing that the standard crybaby circuit was at the heart of this (situated to the left of the pcb where the two tiny transistors are found - the mpsa18 transistors in the pre-smd circuits)... perhaps with both an input buffer and an output buffer?? (The two opamps??). But these were just empirical guesses... no theory or knowledge of audio-electronics like your good self... so I will shut up now!What I see is the classic Crybaby topology with an added opamp. Seems like a input stage starting at C6. Probably with an output amplifier as well
Yet to break through the Space Charge
- borislavgajic
- Opamp Operator
Information
- Posts: 1542
- Joined: 27 Feb 2008, 14:23
- Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
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.... - Location: Sombor , Serbia
- Has thanked: 131 times
- Been thanked: 281 times
here is hi res. picture of component side........
http://www.2shared.com/file/10467185/ad271954/003.html
boris
http://www.2shared.com/file/10467185/ad271954/003.html
boris
- alexradium
- Resistor Ronker
according to your schem there is a boost of 11 in front of a classic wah,i personally think its too much,since there is no pot to regulate that.could you recheck r1 and r2?Goodrat wrote:This is what I came up with for it:
[ Image ]
- alexradium
- Resistor Ronker
sorry just have seen now the 1nF cap,that changes everything...OKalexradium wrote:according to your schem there is a boost of 11 in front of a classic wah,i personally think its too much,since there is no pot to regulate that.could you recheck r1 and r2?Goodrat wrote:This is what I came up with for it:
[ Image ]
- Dirk_Hendrik
- Old Solderhand
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Thanks Rick!
Personally I'd remove and jumper R20 straight away. First create a solid 4.5 volts virtual ground, then screw it up by giving it a 1k source resistance and filtering that off again with a cap.. totally nuts
Personally I'd remove and jumper R20 straight away. First create a solid 4.5 volts virtual ground, then screw it up by giving it a 1k source resistance and filtering that off again with a cap.. totally nuts