Earthquaker Devices - Crimson Drive  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
User avatar
justaddsomeecho
Information
Posts: 10
Joined: 19 Nov 2010, 19:43
Has thanked: 1 time
Been thanked: 4 times

Post by justaddsomeecho »

Hi, guys
Do you have any info about this pedal?
I know, that it is based on germanium AC128 transistor and one bipolar(or, maybe, fet)
there are some guts

User avatar
Steven_M
Resistor Ronker
Information
Posts: 386
Joined: 06 Jul 2009, 19:50
Has thanked: 59 times
Been thanked: 35 times

Post by Steven_M »

If you have guts, I think this can be moved to the regular boutique folder.

Here is a picture from the link:
Crimson.jpg

User avatar
Hides-His-Eyes
Tube Twister
Information
Posts: 1940
Joined: 02 Feb 2010, 12:34
Has thanked: 50 times
Been thanked: 51 times

Post by Hides-His-Eyes »

Neat build.
Testing, testing, won too fwee

User avatar
justaddsomeecho
Information
Posts: 10
Joined: 19 Nov 2010, 19:43
Has thanked: 1 time
Been thanked: 4 times

Post by justaddsomeecho »

Here's another gut
Image

User avatar
gurishka
Breadboard Brother
Information
Posts: 86
Joined: 22 Oct 2008, 02:34
Location: Victoria, Australia
Has thanked: 23 times
Been thanked: 1 time

Post by gurishka »

Would the other si transistor just be for millenium bypass by any chance?

User avatar
gurishka
Breadboard Brother
Information
Posts: 86
Joined: 22 Oct 2008, 02:34
Location: Victoria, Australia
Has thanked: 23 times
Been thanked: 1 time

Post by gurishka »

Scrap that....my mistake...not with it today...

User avatar
bajaman
Old Solderhand
Information
Posts: 4549
Joined: 26 Jun 2007, 21:18
Location: New Brighton, Christchurch, NZ
Has thanked: 595 times
Been thanked: 2058 times

Post by bajaman »

JAFF :wink:
be kind to all animals - especially human beings

User avatar
Steven_M
Resistor Ronker
Information
Posts: 386
Joined: 06 Jul 2009, 19:50
Has thanked: 59 times
Been thanked: 35 times

Post by Steven_M »

bajaman wrote:JAFF :wink:
What about all the extra Caps and clipping diodes?

User avatar
Hides-His-Eyes
Tube Twister
Information
Posts: 1940
Joined: 02 Feb 2010, 12:34
Has thanked: 50 times
Been thanked: 51 times

Post by Hides-His-Eyes »

Only on this forum could somthing with 9 capacitors be "yet another fuzz face"
Testing, testing, won too fwee

User avatar
culturejam
Old Solderhand
Information
Posts: 4062
Joined: 24 Feb 2008, 05:59
Has thanked: 433 times
Been thanked: 563 times
Contact:

Post by culturejam »

I think those two glass-package diodes beside the 4001 are for clipping. :hmmm:

User avatar
Hides-His-Eyes
Tube Twister
Information
Posts: 1940
Joined: 02 Feb 2010, 12:34
Has thanked: 50 times
Been thanked: 51 times

Post by Hides-His-Eyes »

I expect the transistors are for amplifying current and the capacitors are for DC blocking and filtering.
Testing, testing, won too fwee

User avatar
culturejam
Old Solderhand
Information
Posts: 4062
Joined: 24 Feb 2008, 05:59
Has thanked: 433 times
Been thanked: 563 times
Contact:

Post by culturejam »

Hides-His-Eyes wrote:I expect the transistors are for amplifying current and the capacitors are for DC blocking and filtering.
Hey now, smart guy! I was just trying to subtly reinforce the idea that perhaps it's not a part-for-part copy of a Fuzz Face.

Easy, tough guy. Easy.

User avatar
bajaman
Old Solderhand
Information
Posts: 4549
Joined: 26 Jun 2007, 21:18
Location: New Brighton, Christchurch, NZ
Has thanked: 595 times
Been thanked: 2058 times

Post by bajaman »

:lol:
be kind to all animals - especially human beings

User avatar
Hides-His-Eyes
Tube Twister
Information
Posts: 1940
Joined: 02 Feb 2010, 12:34
Has thanked: 50 times
Been thanked: 51 times

Post by Hides-His-Eyes »

culturejam wrote:
Hides-His-Eyes wrote:I expect the transistors are for amplifying current and the capacitors are for DC blocking and filtering.
Hey now, smart guy! I was just trying to subtly reinforce the idea that perhaps it's not a part-for-part copy of a Fuzz Face.

Easy, tough guy. Easy.
I wasn't trying to hate on you dude, just thought it sounded funny ;)

It has two transistors. Other than that I don't see how anybody can call this a fuzz face
Testing, testing, won too fwee

User avatar
culturejam
Old Solderhand
Information
Posts: 4062
Joined: 24 Feb 2008, 05:59
Has thanked: 433 times
Been thanked: 563 times
Contact:

Post by culturejam »

And why are there three fat-ass electrolytics on the board?

Fer fuck's sake, somebody post a damn top-down shot. :lol:

User avatar
justaddsomeecho
Information
Posts: 10
Joined: 19 Nov 2010, 19:43
Has thanked: 1 time
Been thanked: 4 times

Post by justaddsomeecho »

sorry, i can't find a top-down shot

Image
Image
Image

User avatar
Hides-His-Eyes
Tube Twister
Information
Posts: 1940
Joined: 02 Feb 2010, 12:34
Has thanked: 50 times
Been thanked: 51 times

Post by Hides-His-Eyes »

Suppose that one is for slowing the LED switching, one is for the power supply and one is for the output, with the smaller ones being used to bypass emitter resistors?
Testing, testing, won too fwee

User avatar
culturejam
Old Solderhand
Information
Posts: 4062
Joined: 24 Feb 2008, 05:59
Has thanked: 433 times
Been thanked: 563 times
Contact:

Post by culturejam »

Yeah maybe. But why use 100uf for an output cap? Seems like anything bigger than 10uf would be unnecessary.

User avatar
Dirk_Hendrik
Old Solderhand
Information
Posts: 4193
Joined: 03 Jul 2007, 08:44
Location: Old Amsterdam
Has thanked: 232 times
Been thanked: 887 times
Contact:

Post by Dirk_Hendrik »

Hmmm.

Have one on the bench right now which is acting up shitty. Maybe trace it while I'm at it...
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

User avatar
culturejam
Old Solderhand
Information
Posts: 4062
Joined: 24 Feb 2008, 05:59
Has thanked: 433 times
Been thanked: 563 times
Contact:

Post by culturejam »

That would certainly put an end to my blind, fumbling suppositions. :lol:

Post Reply