Musitronics - Mutron Volume Wah (1979) guts

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Post Reply
User avatar
modman
a d m i n
Information
Posts: 4817
Joined: 19 Jun 2007, 16:57
Has thanked: 4287 times
Been thanked: 2008 times

Post by modman »

http://www.j-guitar.com/sp/sea/view_det ... 70352.html

directly to the guts:
http://www.j-guitar.com/sp/sea/data/1827/r/0352_4.jpg

Two footswitches -- so you can use them simultaneously? Sounds interesting, stepping in more treble and vol at the same time.
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal
Top
User avatar
brightboy
Information
Posts: 13
Joined: 13 Nov 2007, 21:01

Post by brightboy »

I'd love to see the schematic for this as I have one of these
that needs to be repaired (functionally works but LED logic is a little
messed up)

Cheers,

Jeff
Top
User avatar
analogguru
Old Solderhand
Information
Posts: 3238
Joined: 26 Jun 2007, 13:58
Been thanked: 123 times
Contact:
Contact analogguru

Post by analogguru »

brightboy wrote:I'd love to see the schematic for this as I have one of these
that needs to be repaired (functionally works but LED logic is a little
messed up)

Cheers,

Jeff
Hmmm.... this are now from the 4th pedal the guts I have seen....
bud sadly I never have seen a schematic.
I also never have seen the track/solder-side of the pcb. If I would, I could have drawn a schematic from this pedal. And I could show this schematic to somebody else who would need it to repair his pedal. :wink:

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
Top
User avatar
MoreCowbell
Transistor Tuner
Information
Posts: 1101
Joined: 06 Aug 2007, 14:39
Been thanked: 15 times
Contact:
Contact MoreCowbell

Post by MoreCowbell »

analogguru wrote:
brightboy wrote:I'd love to see the schematic for this as I have one of these
that needs to be repaired (functionally works but LED logic is a little
messed up)

Cheers,

Jeff
Hmmm.... this are now from the 4th pedal the guts I have seen....
bud sadly I never have seen a schematic.
I also never have seen the track/solder-side of the pcb. If I would, I could have drawn a schematic from this pedal. And I could show this schematic to somebody else who would need it to repair his pedal. :wink:

analogguru
In other words...

Brightboy...take some pictures of your unit (track side, front side, wiring connections) and AG (or one of us forum members) can trace it out for you, so that you'll have the schemo.
Top
User avatar
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: 277 times

Post by borislavgajic »

is there any luck? guts....schem?

It would be great to make komplete tracing of this wah

can not wait :thumbsup

boris
Top
User avatar
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: 277 times

Post by borislavgajic »

could you :arrow: yes yes A3b and PC2 (ldr) function in this circuit?
...and P1 -50 K you have some pictures?


...it lmutron III ....to me

thanks...have a nice freestombox!

boris
Attachments
mutron-c200wahvol.jpg
Top
User avatar
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: 277 times

Post by borislavgajic »

when pedal is moved :arrow: there is more or less light on PC2(ldr) :arrow: D1 provide more or less light(led is near PC1a and PC1b)............Am I right?

...those links are not functional,so please post some pictures.
Top
User avatar
Bernardduur
Transistor Tuner
Information
Posts: 1189
Joined: 24 Aug 2007, 07:36
my favorite amplifier: Welagen - ODR
Location: Losser.........
Has thanked: 89 times
Been thanked: 645 times

Post by Bernardduur »

Awesome........ first time I see the schematic!

Wow
'No more....... loud music.......'
Follow my love for pedals and amps on https://www.instagram.com/bernardduur
Top
User avatar
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: 277 times

Post by borislavgajic »

please if somebody have nicer pictures of PCB,and connections DO NOT POSTTHEM!!!

thank you

boris
Attachments
muuu.JPG
muuu.JPG (26.7 KiB) Viewed 3867 times
mu_bak.JPG
mu_bak.JPG (36.11 KiB) Viewed 3878 times
Top
User avatar
Bernardduur
Transistor Tuner
Information
Posts: 1189
Joined: 24 Aug 2007, 07:36
my favorite amplifier: Welagen - ODR
Location: Losser.........
Has thanked: 89 times
Been thanked: 645 times

Post by Bernardduur »

What is adjusted by the threadle? Is it a pedal like a Morley (threadle moves a cloak for the lights) or does it adjust a pot?
'No more....... loud music.......'
Follow my love for pedals and amps on https://www.instagram.com/bernardduur
Top
User avatar
Dr. Molly
Information
Posts: 46
Joined: 08 Nov 2007, 17:31
Location: Sweden
Been thanked: 2 times

Post by Dr. Molly »

Hi

Not the sharpest ones in the world but ........
/H

Image
Image
Image
Image
Image
Image
Image
Image
Image
Top
User avatar
Bernardduur
Transistor Tuner
Information
Posts: 1189
Joined: 24 Aug 2007, 07:36
my favorite amplifier: Welagen - ODR
Location: Losser.........
Has thanked: 89 times
Been thanked: 645 times

Post by Bernardduur »

From Ampage:

"The LED portion is one one side of the blade mounted on the pedal and the other side is a phototransistor."
'No more....... loud music.......'
Follow my love for pedals and amps on https://www.instagram.com/bernardduur
Top
User avatar
OC26
Breadboard Brother
Information
Posts: 90
Joined: 14 Sep 2007, 06:47
Has thanked: 301 times
Been thanked: 10 times

Post by OC26 »

Bernardduur wrote:From Ampage:

"The LED portion is one one side of the blade mounted on the pedal and the other side is a phototransistor."
Hmmm... It's seems that PC2 is linearizing the response of PC1b and PC1B ( B? 8?). Clever!

It's the the first time I see this schematic. Thank you!

I'd tried this technique some years ago with vactrols "inspired" by a Silonex circuit, but it never worked fine. I think I'm gonna try it again...
Top
User avatar
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: 277 times

Post by borislavgajic »

Here nobody listen what I say!
please if somebody have nicer pictures of PCB,and connections DO NOT POSTTHEM!!!
shit man! :)
.......Now... do not attempt to make useful PCB...it is foooorbiden ! Do not ignore me this time.........grrrrr grrrr.....I had one beer ,and it got me bad...reealy bad....I'm not drinking anymore. :| :| :|
Top
User avatar
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: 277 times

Post by borislavgajic »

http://www.mu-tron.de/sounds/Mu-TronVolumeWah.mp3
http://www.mu-tron.de/sounds/Mu-TronWah.mp3

Dr. Molly please could you take fiew more pictures ...wires,pot,jacks....whole enclosure?
thank you very very much! :thumbsup
Top
User avatar
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: 277 times

Post by borislavgajic »

https://i4.photobucket.com/albums/y114/ ... ahguts.jpg
https://i4.photobucket.com/albums/y114/ ... ptical.jpg
Top
User avatar
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: 277 times

Post by borislavgajic »

I traced schematic from posted photos...and it is little different from posted schem.....
trimpots are wired differently(two resistors 39K added)
vol opamp has cap from pin6 to pin 7.......
resistor 100R in power section (should be 220 R)
output cap looks like polarized(on schem is 10mF NP.)

.....other is the same ...wah is same as on posted schem. :thumbsup

from what period is your pedal Dr. Molly?
Top
User avatar
Dr. Molly
Information
Posts: 46
Joined: 08 Nov 2007, 17:31
Location: Sweden
Been thanked: 2 times

Post by Dr. Molly »

Hi

Mine was made in 1980 according to the pot. I'll post some more photos tomorrow.

/H
Top
User avatar
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: 277 times

Post by borislavgajic »

diferences I noticed....
Attachments
c200 ver2.jpg
c200 ver2.jpg (59.92 KiB) Viewed 3966 times
Top
User avatar
Dr. Molly
Information
Posts: 46
Joined: 08 Nov 2007, 17:31
Location: Sweden
Been thanked: 2 times

Post by Dr. Molly »

Hi

Here's some more pictures of my C200

https://i181.photobucket.com/albums/x12 ... G_1867.jpg
https://i181.photobucket.com/albums/x12 ... G_1866.jpg
https://i181.photobucket.com/albums/x12 ... G_1865.jpg
https://i181.photobucket.com/albums/x12 ... G_1863.jpg
https://i181.photobucket.com/albums/x12 ... 1862_2.jpg
https://i181.photobucket.com/albums/x12 ... 1860_2.jpg
https://i181.photobucket.com/albums/x12 ... 1858_2.jpg

/H
Top
Post Reply

Return to “Vintage Stompbox Corner ( ... - 1975)”