Tight Metal - Reverse Engineer?

[J0K3RX]

Ok, I'm not really one to reverse engineer pedals but this one is too good to pass up Also, I can't get over the fact that NOBODY has attempted this pedal yet!?!? Soooo... I bought one just to rip apart so we can all have some fun... Well, really it's for me I'm not gonna lie I have already traced the pedal but I need some help with the schematic (I really suck at making schematics) I can read them just fine but making them from a trace is another story... So, if you would like to help either post here or shoot me a PM. If not, I will go it alone

Reasons why I chose this pedal;

1 - It's BRAHUUU_TAHALLLLLL!!!  
2 - It has some interesting features, noise gate that tracks the gain knob, tight attack control, mid/thrash switch, pre and post fx loop that tracks the On/Off footswitch...
3 - Some of these features can probably be incorporated into other designs.. good learning!
4 - Looks like it's using very easy to get common parts.
5 - It's BRAHUUU_TAHALLLLLL!!!  

If you have never heard of this here are a couple vidoes...

Here is a teaser... If anybody is interested in this then respond and I will upload my traces!?

https://www.dropbox.com/sh/x2u0g6jdhtik5i4/_Sb3kXUSht

[pakrat]

Ummmm..... yes please, upload traces   

[candidate]

Slightly off topic...

One of my few brushes with stardom was getting to know Mark Kloeppel.  He is a nice guy.  I tried to grill him on just about anything I could ask.  I wish some of that information was helpful in this thread.

Good luck with your investigation into the pedal.

[J0K3RX]

https://www.dropbox.com/sh/x2u0g6jdhtik5i4/_Sb3kXUSht

Anybody?

[deadastronaut]

brave man..

[J0K3RX]

I can't believe no interest here???    wow!

Oh well, here goes nothin.

No on-board pots and no silly LED light up knobs... All the rest is there!

By the way, this is NOT Verified, yet! Don't be a sissy... Check it yourself, and maybe build it if you dare!  

I fully expect that this will sink into the abyss of this forum, prove me wrong...

Schematic
https://dl.dropboxusercontent.com/u/11178619/TM1/TM%20schem%203f.png

Single sided layout with ground fill
https://dl.dropboxusercontent.com/u/11178619/TM1/TM1_FILL.pdf

Single sided layout without ground fill
https://dl.dropboxusercontent.com/u/11178619/TM1/TM1.pdf

[defaced]

Your ground trace forms a ground loop around the perimeter of the board.  It will hum like a SOB like that.  You need to break it somewhere so the current only has _one_ path it can flow. 

[John Lyons]

I may not build it but I applaud your work on it.  Nice job.

[J0K3RX]

Your ground trace forms a ground loop around the perimeter of the board.  It will hum like a SOB like that.  You need to break it somewhere so the current only has _one_ path it can flow.  

Good point!!!   Thanks for the heads up!

The pics and layouts are corrected in the original post, loop broken on far right.

Thanks to defaced for the catch!

Here is the bill of materials if needed..
https://dl.dropboxusercontent.com/u/11178619/TM1/tight%20metal%20bom.txt

[Mike Burgundy]

looking good! Curious about the bass version now... ;P

[slacker]

Not my bag but it's an interesting looking design, some nice snippets in there. Nice work tracing it.

[pakrat]

I've taken the liberty of putting together a BOM for this project:

RESISTORS

R1-1M
R2-100K
R3-470K
R4-1M
R5-47K
R6-1M
R7-470K
R8-47K
R9-1.5K
R10-1.5K
R11-22K
R12-10K
R13-10K
R14-10K
R15-470K
R16-4.7K
R17-1.5K
R18-10K
R19-3.3K
R20-3.3K
R21-3.3K
R22-330 OHM
R23-220K
R24-100K
R25-47K
R26-1K
R27-47K
R28-100K
R29-150K
R30-6.8K
R31-100K
R32-18K
R33-150K
R34-47K
R35-470 OHM

CAPACITORS

C1-470PF
C2-33NF
C3-100NF
C4-4.7NF
C5-100NF
C6-100PF
C7-33NF
C8-47NF
C9-100NF
C10-220NF
C11-100NF
C12-100NF
C13-100NF
C14-22NF
C15-100NF
C16-220NF
C17-1.2NF
C18-100NF
C19-220NF
C20-100UF ELECTRO
C21-100NF
C22-22UF ELECTRO
C23-22UF ELECTRO
C24-22UF ELECTRO

DIODES

D1-1N4148
D2-1N4007
D3-1N4148
D4-1N4733
D5-1N4148
D6-1N4148
D7-1N4733
D8-1N4007

IC'S

IC1-TL072P
IC2-TL072P
IC3-TL072P

POTS

TIGHT-B100K
GAIN-A500K
VOLUME-B10K
TONE-B10K

SWITCHES

GATE-SPDT ON/OFF TOGGLE
THRASH-SPDT ON/OFF TOGGLE

PART COUNTS

RESISTORS

(3) 1M
(4) 100K
(3) 470K
(5) 47K
(3) 1.5K
(1) 22K
(4) 10K
(1) 4.7K
(3) 3.3K
(1) 330 OHM
(1) 220K
(1) 1K
(2) 150K
(1) 6.8K
(1) 18K
(1) 47 OHM

CAPACITORS

(1) 470PF
(2) 33NF
(9) 100NF
(1) 4.7NF
(1) 100PF
(1) 47NF
(3) 220NF
(1) 22NF
(1) 1.2NF
(1) 100UF ELECTRO
(3) 22UF ELECTRO

IC'S

(3) TL072P

DIODES

(4) 1N4148
(2) 1N4007
(2) 1N4733

POTS

(1) B100K
(1) A500K
(2) B10K

SWITCHES

(2) SPDT ON/OFF TOGGLES

[jymaze]

I wanted to make a single sided with no frills... I see you beat me to that Jok3rx... It would have taken me forever anyway since I have so little free time...

[J0K3RX]

I wanted to make a single sided with no frills... I see you beat me to that Jok3rx... It would have taken me forever anyway since I have so little free time...

jymaze,

Well, mainly YOU and bajaman did all the hard work and came up with the schematics! Many thanks!!!  This was a beast to draw schematics for in my opinion, very erratic jumping from one side to the other...

As for "no frills" I personally would have liked to leave off the loops but figured somebody might want them...

[J0K3RX]

I've taken the liberty of putting together a BOM for this project:

RESISTORS

R1-1M
R2-100K
R3-470K
R4-1M
R5-47K
R6-1M
R7-470K
R8-47K
R9-1.5K
R10-1.5K
R11-22K
R12-10K
R13-10K
R14-10K
R15-470K
R16-4.7K
R17-1.5K
R18-10K
R19-3.3K
R20-3.3K
R21-3.3K
R22-330 OHM
R23-220K
R24-100K
R25-47K
R26-1K
R27-47K
R28-100K
R29-150K
R30-6.8K
R31-100K
R32-18K
R33-150K
R34-47K
R35-470 OHM

CAPACITORS

C1-470PF
C2-33NF
C3-100NF
C4-4.7NF
C5-100NF
C6-100PF
C7-33NF
C8-47NF
C9-100NF
C10-220NF
C11-100NF
C12-100NF
C13-100NF
C14-22NF
C15-100NF
C16-220NF
C17-1.2NF
C18-100NF
C19-220NF
C20-100UF ELECTRO
C21-100NF
C22-22UF ELECTRO
C23-22UF ELECTRO
C24-22UF ELECTRO

DIODES

D1-1N4148
D2-1N4007
D3-1N4148
D4-1N4733
D5-1N4148
D6-1N4148
D7-1N4733
D8-1N4007

IC'S

IC1-TL072P
IC2-TL072P
IC3-TL072P

POTS

TIGHT-B100K
GAIN-A500K
VOLUME-B10K
TONE-B10K

SWITCHES

GATE-SPDT ON/OFF TOGGLE
THRASH-SPDT ON/OFF TOGGLE

PART COUNTS

RESISTORS

(3) 1M
(4) 100K
(3) 470K
(5) 47K
(3) 1.5K
(1) 22K
(4) 10K
(1) 4.7K
(3) 3.3K
(1) 330 OHM
(1) 220K
(1) 1K
(2) 150K
(1) 6.8K
(1) 18K
(1) 47 OHM

CAPACITORS

(1) 470PF
(2) 33NF
(9) 100NF
(1) 4.7NF
(1) 100PF
(1) 47NF
(3) 220NF
(1) 22NF
(1) 1.2NF
(1) 100UF ELECTRO
(3) 22UF ELECTRO

IC'S

(3) TL072P

DIODES

(4) 1N4148
(2) 1N4007
(2) 1N4733

POTS

(1) B100K
(1) A500K
(2) B10K

SWITCHES

(2) SPDT ON/OFF TOGGLES

D2, D4 and D7 are 1N4733

On the schematic they are listed as Z2, Z4 and Z7

Great job by the way! 

[J0K3RX]

Well, the schematic is verified anyway... good work jymaze and bajaman!!  

I don't know about my layout but I believe the schematic is 100% correct!



Bread boarded TM buy ggedamed from "the other forum"

[pakrat]

There are 2 resistors missing from the BOM I poster earlier 
Here is the corrected version:

RESISTORS

R1-1M
R2-100K
R3-470K
R4-1M
R5-47K
R6-1M
R7-470K
R8-47K
R9-1.5K
R10-1.5K
R11-22K
R12-10K
R13-10K
R14-10K
R15-470K
R16-4.7K
R17-1.5K
R18-10K
R19-3.3K
R20-3.3K
R21-3.3K
R22-330 OHM
R23-220K
R24-100K
R25-47K
R26-1K
R27-47K
R28-100K
R29-150K
R30-6.8K
R31-100K
R32-18K
R33-150K
R34-47K
R35-470 OHM
R36-100K
R37-150K

CAPACITORS

C1-470PF
C2-33NF
C3-100NF
C4-4.7NF
C5-100NF
C6-100PF
C7-33NF
C8-47NF
C9-100NF
C10-220NF
C11-100NF
C12-100NF
C13-100NF
C14-22NF
C15-100NF
C16-220NF
C17-1.2NF
C18-100NF
C19-220NF
C20-100UF ELECTRO
C21-100NF
C22-22UF ELECTRO
C23-22UF ELECTRO
C24-22UF ELECTRO

DIODES

D1-1N4148
D2-1N4007
D3-1N4148
D4-1N4733
D5-1N4148
D6-1N4148
D7-1N4733
D8-1N4007

IC'S

IC1-TL072P
IC2-TL072P
IC3-TL072P

POTS

TIGHT-B100K
GAIN-A500K
VOLUME-B10K
TONE-B10K

SWITCHES

GATE-SPDT ON/OFF TOGGLE
THRASH-SPDT ON/OFF TOGGLE

PART COUNTS

RESISTORS

(3) 1M
(5) 100K
(3) 470K
(5) 47K
(3) 1.5K
(1) 22K
(4) 10K
(1) 4.7K
(3) 3.3K
(1) 330 OHM
(1) 220K
(1) 1K
(3) 150K
(1) 6.8K
(1) 18K
(1) 47 OHM

CAPACITORS

(1) 470PF
(2) 33NF
(9) 100NF
(1) 4.7NF
(1) 100PF
(1) 47NF
(3) 220NF
(1) 22NF
(1) 1.2NF
(1) 100UF ELECTRO
(3) 22UF ELECTRO

IC'S

(3) TL072P

DIODES

(4) 1N4148
(2) 1N4007
(2) 1N4733

POTS

(1) B100K
(1) A500K
(2) B10K

SWITCHES

(2) SPDT ON/OFF TOGGLES

[pakrat]

Sorry about this..... more corrections to the BOM:

RESISTORS

R1-1M
R2-100K
R3-470K
R4-1M
R5-47K
R6-1M
R7-470K
R8-47K
R9-1.5K
R10-1.5K
R11-22K
R12-10K
R13-10K
R14-10K
R15-470K
R16-4.7K
R17-1.5K
R18-10K
R19-3.3K
R20-3.3K
R21-3.3K
R22-330 OHM
R23-220K
R24-100K
R25-47K
R26-1K
R27-47K
R28-100K
R29-150K
R30-6.8K
R31-100K
R32-18K
R33-150K
R34-47K
R35-47 OHM
R36-100K
R37-150K

CAPACITORS

C1-470PF
C2-33NF
C3-100NF
C4-4.7NF
C5-100NF
C6-100PF
C7-33NF
C8-47NF
C9-100NF
C10-220NF
C11-100NF
C12-100NF
C13-100NF
C14-22NF
C15-100NF
C16-220NF
C17-1.2NF
C18-100NF
C19-220NF
C20-100UF ELECTRO
C21-100NF
C22-22UF ELECTRO
C23-22UF ELECTRO
C24-22UF ELECTRO

DIODES

D1-1N4148
D2-1N4733
D3-1N4148
D4-1N4733
D5-1N4007
D6-1N4148
D7-1N4733
D8-1N4007

IC'S

IC1-TL072
IC2-TL072
IC3-TL072

POTS

TIGHT-B100K
GAIN-A500K
VOLUME-B10K
TONE-B10K
GATE-A500K

SWITCHES

GATE-SPDT ON/OFF TOGGLE
THRASH-SPDT ON/OFF TOGGLE

PART COUNTS

RESISTORS

(3) 1M
(5) 100K
(3) 470K
(5) 47K
(3) 1.5K
(1) 22K
(4) 10K
(1) 4.7K
(3) 3.3K
(1) 330 OHM
(1) 220K
(1) 1K
(3) 150K
(1) 6.8K
(1) 18K
(1) 47 OHM

CAPACITORS

(1) 470PF
(2) 33NF
(9) 100NF
(1) 4.7NF
(1) 100PF
(1) 47NF
(3) 220NF
(1) 22NF
(1) 1.2NF
(1) 100UF ELECTRO
(3) 22UF ELECTRO

IC'S

(3) TL072P

DIODES

(3) 1N4148
(2) 1N4007
(3) 1N4733

POTS

(1) B100K
(2) A500K
(2) B10K

SWITCHES

(2) SPDT ON/OFF TOGGLES

[JebemMajke]

I can't believe no interest here???    wow!

Oh well, here goes nothin.

No on-board pots and no silly LED light up knobs... All the rest is there!

By the way, this is NOT Verified, yet! Don't be a sissy... Check it yourself, and maybe build it if you dare!  

I fully expect that this will sink into the abyss of this forum, prove me wrong...

Schematic
https://dl.dropboxusercontent.com/u/11178619/TM1/TM%20schem%203f.png

Single sided layout with ground fill
https://dl.dropboxusercontent.com/u/11178619/TM1/TM1_FILL.pdf

Single sided layout without ground fill
https://dl.dropboxusercontent.com/u/11178619/TM1/TM1.pdf

So, the schem is verified?

[pakrat]

It's not verified yet, but if you want to join the fight use the ground plane version and start posting some results    I have it built but have some issues to sort out.....