Fender - Yngwie Malmsteen Overdrive

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
Post Reply
User avatar
kaya112
Information
Posts: 30
Joined: 04 May 2014, 02:11
Has thanked: 1 time
Been thanked: 8 times

Post by kaya112 »

http://www.yngwiemalmsteen.com/yngwie/f ... cessories/

You suppose it's a red OD250?

User avatar
kaya112
Information
Posts: 30
Joined: 04 May 2014, 02:11
Has thanked: 1 time
Been thanked: 8 times

Post by kaya112 »


User avatar
p.eat
Information
Posts: 46
Joined: 24 Aug 2007, 13:27
Has thanked: 50 times
Been thanked: 16 times

Post by p.eat »

Why didn't Fender make the scale go to 11? :roll:

User avatar
mirosol
Resistor Ronker
Information
Posts: 265
Joined: 11 Mar 2012, 16:15
my favorite amplifier: Been on Bogner for quite some time now.
Completed builds: Over 1000 and counting.
Location: TKU, FI
Has thanked: 161 times
Been thanked: 388 times

Post by mirosol »

Every now and then it's great to find you are dead wrong about something.

Bought one of these in late spring on an impulse. Tried it out of course and it sounded and felt quite close to my DOD Malmsteen signature. Not quite like it, but sorta close. Tried to open it up back then, but didn't have suitable allen key (what's with you people using imperial keys!) to take the knobs off. So it got left behind and i almost forgot all about it. Today i suddenly recalled that i had ordered imperial keys long ago and took the pedal apart. Didn't get to do any tracing, but snapped a few shots and wrote the BOM down. And no. It is not an OD250.

So. This is what i have for now...

C1 - 102
C2 - 4µ7/50V
C3 - 474
C4 - 102
C5 - 10µ/50V
C6 - 221
C7 - 10p
C8 - 4µ7/50V
C9 - 103
C10 - 104
C11 - 104
C12 - 4µ7/50V
C13 - 2µ2/50V
C14 - 102
C15 - 4µ7/50V
C16 - 391
C17 - 104
C18 - 102
C19 - 104

R1 - 10K
R2 - 470K
R3 - 10K
R4 - 10M
R5 - 110K
R6 - 100R
R7 - 22K
R8 - 22K
R9 - 470K
R10 - 1R
R11 - 200K
R12 - 100K
R13 - 1K2
R14 - 200K
R15 - 470R
R16 - 100R
R17 - 10K
R18 - 22K

U1 - Texas Instruments RC4558P
Q1 - 2N7000
Q3 - 2N7000
D1 - 1N4148 (or something very close)
D2- 1N4148 (or something very close)
D4 - 1N4148 (or something very close)

Errors are possible.
Attachments
Fender-YJMOD-guts1.JPG
Fender-YJMOD-guts2.JPG
Fender-YJMOD-guts3.JPG
Fender-YJMOD-guts4.JPG
http://tagboardeffects.blogspot.com/
http://mirosol.kapsi.fi/
"No such thing as innocence" -Iron Chic

User avatar
jefjef
Information
Posts: 1
Joined: 08 Jan 2016, 14:19
Has thanked: 1 time

Post by jefjef »

Thanks for your post and the great pics, Mirosol. :D Unfortunately, we can't see the wiring and resistors hidden behind the potentiometers... Can anyone help? :roll:

User avatar
roseblood11
Tube Twister
Information
Posts: 1859
Joined: 23 Aug 2008, 14:21
Has thanked: 350 times
Been thanked: 307 times

Post by roseblood11 »

It's a variation of the DOD250 or DOD308:


The second opamp could be used to add a little volume at the end. The mosfets are for switching and maybe polarity protection

User avatar
ranjam
Information
Posts: 24
Joined: 17 Apr 2010, 02:48
Been thanked: 8 times

Post by ranjam »

What looks interesting to me is the reverse audio-taper pot for the gain control. DOD did that a lot for their later distortion boxes, and you'll see the last little bit at the top end of the rotation was marked 'BOOST'. Usually here it gets over the top, and noisy. I've replaced them with a lower value linear taper pot, and been a lot happier with my DOD. Yes, less gain, but less over the top.
Image
'You can lead a horticulture, but you can't make her think.'

User avatar
roseblood11
Tube Twister
Information
Posts: 1859
Joined: 23 Aug 2008, 14:21
Has thanked: 350 times
Been thanked: 307 times

Post by roseblood11 »

As far as I know, every DOD 250, MXR Distortion+ and Micro Amp came with a C500k gain pot.

User avatar
ranjam
Information
Posts: 24
Joined: 17 Apr 2010, 02:48
Been thanked: 8 times

Post by ranjam »

I'm not sure that's right. My handful of vintage and reissue Distortion+ boxes have A1Meg Gain controls. The Microamp yes, but DOD was known for RA controls from my experience. The last 280 compressor I restored had a C500K 'Sensitivity' control, and they're difficult to locate. Not impossible, but difficult. In that part of the circuit, it doesn't have that huge jump at the end and compress over the top, but as a Gain control in all my 'later' DOD dirt boxes, they just have that huge jump right at about 4:00, go over the top, and the pedal gets noisy. Now I haven't played a YJM box, but I'd suspect the same, and that's weird to me. We're all so particular these days about our pedals, and putting one out that has those 'quirks' seems like a bad idea. I could be 100% wrong, but that's just a first impression from the photo.
'You can lead a horticulture, but you can't make her think.'

User avatar
kaya112
Information
Posts: 30
Joined: 04 May 2014, 02:11
Has thanked: 1 time
Been thanked: 8 times

Post by kaya112 »

Thanks for your post and the great pics, Mirosol. :D Unfortunately, we can't see the wiring and resistors hidden behind the potentiometers... Can anyone help? :roll:

User avatar
teddeeh
Breadboard Brother
Information
Posts: 64
Joined: 13 Jun 2016, 21:54
Has thanked: 8 times
Been thanked: 15 times

Post by teddeeh »

I just got onenof these too, miro, what do you think? I like it. I like the responseni get, i havent done the yngwie setting yet “all cranked into a dirty marshall” but i like the top end response. I like alot of bite hence why i love the bb and kot soo much. I think its especially great for retaining clarity and treble in the neck humbuggy position. Wish i had known about these in my gigging days.

User avatar
patafix
Breadboard Brother
Information
Posts: 84
Joined: 16 Jan 2008, 11:21
Been thanked: 2 times

Post by patafix »

Could it be some kind of Voodoo Lab OD, which essentially is a DOD250 + additionnal gain stage.Image
Patafix... so sticky

User avatar
andshadows
Information
Posts: 1
Joined: 09 Mar 2016, 18:06
Been thanked: 1 time

Post by andshadows »

[quote=jefjef post_id=256710 time=1452286813 user_id=76629]
Thanks for your post and the great pics, Mirosol. :D Unfortunately, we can't see the wiring and resistors hidden behind the potentiometers... Can anyone help? :roll:
[/quote now I got pics closer of resistors below the pots. I routed the trails from bottom with sprint layout. with your help I can route the top too.
cheers
sorry about the number of picks. these was taken by a friend in the other side of the country
Attachments
f90a4cab-37ae-44c0-ab6e-007794400650.jpg
e02b0f4a-afc5-4a2c-9711-7cb1f95dd081.jpg
d1268733-dd7f-43b7-8a30-e77efb0829ad.jpg
d5c65f72-1437-494c-81ad-20887be35a84.jpg
c30361d0-0680-447f-bfee-590502ee161c.jpg
c65e935c-667d-4525-b288-9d3e40f343ea.jpg
b2c38f23-9276-4f38-8c56-de220d660ad8.jpg
34010830-e79c-4c71-9abb-077ae7b61812.jpg
9c5dd16b-7c37-4c7b-a093-bbe28ca7d2a6.jpg
4eeefb2d-ba10-44ee-8d09-c434bb099058.jpg
2f82ba8a-4376-4d69-a6e6-08c1bea3f965.jpg
0b836574-b14d-4be4-9557-c1a4b56e00d5.jpg

User avatar
Guardead
Information
Posts: 1
Joined: 09 Apr 2021, 07:07

Post by Guardead »

Great post thanks to mirosol! :worship:
Has anyone done any further work on this? I tried to trace the circuit using the photos posted here to learn how it's done and it's certainly not DOD250 or DOD YJM308 or the voodoo drive!
Does anyone know if it has been done by someone already? Maybe we can collaborate and be the firsts! :)

Post Reply