Lets do Metal Muff diy

ubaid88 · December 20, 2009, 03:49:54 AM

I thinking of building a metal muff. I found the schematic and simplified it a bit. Here my version of schematic.

Switch1 is top boost.
It bit complex but not that difficult to build. So please have look to schematic and any suggestion, error point out or more simplifications will be more than welcomed.

caspercody · December 21, 2009, 01:56:23 PM

Did you do this in Eagle? Do you have the pcb board made for this?

naku · February 25, 2010, 09:57:32 AM

I started buiilding this yesterday, no sounding yet becouse i have to check my wiring. I question for ubaid, 16 emmiter stays open? if u have traced this with eagle i would appreciate the file or pcb jpg. Now is in my protoboard!

gdluck building it!

ubaid88 · February 25, 2010, 04:05:39 PM

Ok here is revised schematic. I have corrected the mistakes.

bumblebee · February 25, 2010, 06:15:46 PM

You can almost buy one for what it cost to make this pedal...

ubaid88 · February 26, 2010, 04:53:04 AM

Quote from: bumblebee on February 25, 2010, 06:15:46 PM
You can almost buy one for what it cost to make this pedal...

really

bumblebee · February 26, 2010, 05:54:38 AM

They arent expensive at all, http://guitars.musiciansfriend.com/product/ElectroHarmonix-Metal-Muff-with-Top-Boost?sku=153339

Sure you can make one a bit cheaper (not with silkscreen though likely for a one off) but will it look as cool? Besides,it wont be EHX!

naku · February 26, 2010, 06:44:08 AM

yeah! now a different thing! thanx a lot ubaid! i will make that corrections this afternoon and will tell u what i get about this precious... for me it's very much cheaper to build it...

ubaid88 · February 26, 2010, 01:00:37 PM

Thank Naku for implementing. Tell us with results so that i can start working on pcb. I don't got a breadboard so myself i didn't tested this. But if still you got some problems, i will pm you the original factory schematic. Original schematic is not allowed to be posted on this forum EHX claimed its copyright. But original schematic is more complex and very difficult to understand.

@bumblebee,
for me it is max $5 for everything that includes power supply and chassis as well. I can buy these things locally. Also it only got opamp so they are not difficult to find.

bumblebee · February 26, 2010, 04:46:14 PM

5 bucks,well if you can bulid this for that you'r doing better than the majority of us on here! Just the enclosure (hammond) will cost at least four times that if I were to make it.

mokafix · March 20, 2010, 07:04:01 AM

Quote from: ubaid88 on December 20, 2009, 03:49:54 AM
I thinking of building a metal muff. I found the schematic and simplified it a bit. Here my version of schematic.

Good job !
Isn't there something weird in the Drive stage (pot1) though?

ubaid88 · March 20, 2010, 08:18:52 AM

Thanks for pointing this out. Sorry for my mistake. I have fixed that in this updated version.

I still got the original factory schematic. If anyone need that pm me. I will send him the schematic. It cannot posted on forum because of copyright issue.

mokafix · March 20, 2010, 09:30:19 AM

Thanks for your work !

I noticed a few other mistakes :
C14, R35 and R53 values are missing.
The rest seems fine.

askwho69 · August 19, 2010, 10:25:24 PM

OHH forgotten topics!!!!!!!!!!!! REBORN METALMUFF

Jaca · August 30, 2010, 03:32:22 AM

Hello!

I build a Boss MT-2, Its look like the metal muff. ( http://www.freeinfosociety.com/electronics/schemview.php?id=138 )
Q1, Q2 and Q3 I use BC182B transistor, it most popular for audio in Hungary, but not a good sound. I will buy the original type of transistor, and try it. With 2N5088 is OK? D1, D2 I try shcottky diodes, it faster, and lower forward voltage.
(sorry the poor English)

Jaca

Jaca · August 30, 2010, 05:05:36 PM

ubaid88!

I check Your schematics
Value of C21 is missing, and Q4 is not have basis current, I think, a resistor is missing from VCC, or Q4 collector is on VCC?

Jaca

askwho69 · October 03, 2010, 12:36:52 AM

Hi Jaca do you a PCB of Metazone? its one of the most versatile boss pedal ever!! if you have can you please share it to me please? askwho69@yahoo.com

BadIdeas · October 03, 2010, 10:45:12 PM

Hey, I've got a Metal Muff! I find it to be a bit temperamental, and not necessarily in the rockin' way. It sounds cool IF I don't push too much input in to it, and I don't believe my pickups are particularly hot. With my guitar's volume pot rolled back, it sounds great. When I turn it up, it's a bit fizzy and bad sounding. Has any body else had this experience?
I just ordered a Pocket MM, but sent it back because a screwhead was stripped and I couldn't get the bottom plate off. I have heard that this version used through-hole rather than SMT. If the smaller one behaves the same way, is there an easy fix? I wondered if maybe a resistor at the input would help, but I'm not sure.

bside2234 · October 08, 2010, 11:46:08 PM

Quote from: Jaca on August 30, 2010, 03:32:22 AM
Hello!

I build a Boss MT-2, Its look like the metal muff. ( http://www.freeinfosociety.com/electronics/schemview.php?id=138 )
Q1, Q2 and Q3 I use BC182B transistor, it most popular for audio in Hungary, but not a good sound. I will buy the original type of transistor, and try it. With 2N5088 is OK? D1, D2 I try shcottky diodes, it faster, and lower forward voltage.
(sorry the poor English)

Jaca

I agree. That schematic looks like an MT-2 with fixed frequency and a boost tacked on the end. I did just glance at it so I could be wrong.

GodSaveMetal · December 22, 2010, 12:16:02 PM

Quote from: ubaid88 on March 20, 2010, 08:18:52 AM
Thanks for pointing this out. Sorry for my mistake. I have fixed that in this updated version.

I still got the original factory schematic. If anyone need that pm me. I will send him the schematic. It cannot posted on forum because of copyright issue.

hey send me your factory schem of this pedal!!! can you have one??? you post some photos of it' please!!!! my personal mail is: rbarriost@yahoo.com, thanks a lot!!!!

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Lets do Metal Muff diy