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Shoegazers Anonymous
Silver Member

Sweden
257 Posts

Posted - 09/30/2008 :  12:07:41  Show Profile  Visit Shoegazers Anonymous's Homepage  Reply with Quote
Hi!

OS-2 is a quite good pedal in stock I think. But is there any good mods to make it even better out there? I mean, the distortion in OS-2 is nearly similar to DS-1, and that one have a lot of good mods. The overdrive in in OS-2 is quite like the SD-2 - wich also have a lot of good mods. So when thinking of it it sounds like it would be possible to make a badass subtle OS-2. But maybe it�s to complex as it is. I don�t know. Any thoughts about it?

zerksies
Double Platinum Member

USA
3406 Posts

Posted - 10/01/2008 :  02:41:48  Show Profile  Send zerksies an AOL message  Click to see zerksies's MSN Messenger address  Send zerksies a Yahoo! Message  Reply with Quote
you can try and replace the caps on it that usually will do the trick

d8 led
r2 6.6k
r39 1k
c27 .008uf
r37 10k

r30 1k
c18 .1uf
d3 1n4148 +1n4148 connected in series
d4 led
r23 10k
c19 .47uf
c16 .0047uf
c20 .047uf
r32 47k

this is for the big/full/fat mod
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Shoegazers Anonymous
Silver Member

Sweden
257 Posts

Posted - 10/01/2008 :  08:28:51  Show Profile  Visit Shoegazers Anonymous's Homepage  Reply with Quote
Thanks Zerksies!

I have never done this before, but I have changed pots and caps in my guitars and have the gear. So I think that it can be made. But when you write r2 for example, is that the place on the board that is named r2, and is r2 written on the board or do I have to get a chematic or so?
You have wrote that d8 and d4 is led, are there two of them? Im a newbie at this so I need a dummie explanation or a "handbook" step by step or at least a manual I guess. Do you know if there is one out there, or is there someone who make these mods, ex mone allum mods or keeley?

quote:
Originally posted by zerksies

you can try and replace the caps on it that usually will do the trick

d8 led
r2 6.6k
r39 1k
c27 .008uf
r37 10k

r30 1k
c18 .1uf
d3 1n4148 +1n4148 connected in series
d4 led
r23 10k
c19 .47uf
c16 .0047uf
c20 .047uf
r32 47k

this is for the big/full/fat mod

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zerksies
Double Platinum Member

USA
3406 Posts

Posted - 10/03/2008 :  02:03:11  Show Profile  Send zerksies an AOL message  Click to see zerksies's MSN Messenger address  Send zerksies a Yahoo! Message  Reply with Quote
r2 is written on the board and d4 and d2 is just an led that is hidden. in the case
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ChristoMephisto
Platinum Member

Canada
1288 Posts

Posted - 10/04/2008 :  03:00:28  Show Profile  Reply with Quote
�Marshall� type tones:
Location Mod value
C28 .22UF AND 1K CONNECTED IN PARALLEL
D8 LED
D3 LED
C27 .047UF
C23 10UF
C18 .47UF


For fun, experiment with these changes:
Location Mod value What it effects
Clipping diodes: Led�s *, germaniums, or 1n4001s
Led�s will make it a bit fuller, louder, and more bass.
Germaniums will give it more of a tube flavor, 1n4001�s will increase
the distortion/overdrive capability.

C27 .22uf/.15UF/.1UF/ FOR BASS GUITAR, MAKE 1UF Adds bass on od side

C16 (experiment with .022 uf,.033 uf, .047uf, .068 uf,.1uf or higher)
Increase value for more mids on dist side

R27 1-22k, or you could install a pot in it�s place to control
mids lower value for mid increase on dist side


I always did dig the overdrive on this pedal, nice n meaty
Joe Walsh used one ofter a HM-2
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jp_gentle
Copper Member

Japan
6 Posts

Posted - 10/18/2009 :  06:04:19  Show Profile  Reply with Quote
zerksies>
I did your mod recently.
the sound is surely fatter and richer; however, less gain than a stock.
is there any way to get more gain with the same tone?
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jsoi_narciso
Silver Member

Philippines
200 Posts

Posted - 10/18/2009 :  06:47:01  Show Profile  Send jsoi_narciso a Yahoo! Message  Reply with Quote
quote:
Originally posted by jp_gentle

zerksies>
I did your mod recently.
the sound is surely fatter and richer; however, less gain than a stock.
is there any way to get more gain with the same tone?



if i were you, i wont increase my gain anymore, tone for me is important than gain.
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jp_gentle
Copper Member

Japan
6 Posts

Posted - 10/19/2009 :  13:24:42  Show Profile  Reply with Quote
quote:
if i were you, i wont increase my gain anymore, tone for me is important than gain.


Yeah!! It is also important!!!!
In my opinion, it would be better if I got more gain!!!
I changed OP Amp #2 to 2043DD.
I got little bit more gain.
But... I would like to get more!!!!!
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jp_gentle
Copper Member

Japan
6 Posts

Posted - 10/20/2009 :  14:41:38  Show Profile  Reply with Quote
anybody have any ideas?
to get more gain with big/full/fat mod?
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ChristoMephisto
Platinum Member

Canada
1288 Posts

Posted - 10/21/2009 :  11:16:06  Show Profile  Reply with Quote
quote:
Originally posted by jp_gentle

anybody have any ideas?
to get more gain with big/full/fat mod?



Found the OS2 has more gain than a SD1
but to get more gain out of the OD, reduce r39 to 47k, and c23 to 10uf
this keeps the same frequency corner
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jp_gentle
Copper Member

Japan
6 Posts

Posted - 10/21/2009 :  17:16:34  Show Profile  Reply with Quote
quote:
Found the OS2 has more gain than a SD1
but to get more gain out of the OD, reduce r39 to 47k, and c23 to 10uf
this keeps the same frequency corner


ChristoMephisto>
Thanks for a reply!!!
it seems to me that your idea affect to overdrive side.
Does this idea also provide more gain on distortion side?

Thanks.
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jp_gentle
Copper Member

Japan
6 Posts

Posted - 10/23/2009 :  15:04:29  Show Profile  Reply with Quote
mmmmmm......
Is it impossible to have
the same amount of gain as OD-3 in OVERDRIVE SIDE and
the same amount of gain as DS-1 in Distortion side?

ChristoMephisto's Idea that he gave me can make it?
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jp_gentle
Copper Member

Japan
6 Posts

Posted - 10/25/2009 :  14:23:49  Show Profile  Reply with Quote
ChristoMephisto>
Thanks!!!!!
Your advise was fab!!!!!!
I got enough gain with great tone!!!!

By the way, what kind of the part of circuit r39 and c23 are?
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Shoegazers Anonymous
Silver Member

Sweden
257 Posts

Posted - 11/16/2009 :  20:43:59  Show Profile  Visit Shoegazers Anonymous's Homepage  Reply with Quote
quote:
Originally posted by jp_gentle

ChristoMephisto>
Thanks!!!!!
Your advise was fab!!!!!!
I got enough gain with great tone!!!!

By the way, what kind of the part of circuit r39 and c23 are?



Is it possible to have this mod made the way your pedal finally came up with and then buy it from you?
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sirgus
Copper Member

Chile
5 Posts

Posted - 03/03/2010 :  02:50:11  Show Profile  Visit sirgus's Homepage  Reply with Quote
I made this mod:
d8 led
r2 6.6k
r39 1k
c27 .008uf
r37 10k
r30 1k
c18 .1uf
d4 led
r23 10k
c19 .47uf
c16 .0047uf
c20 .047uf
r32 47k
C28 .22UF AND 1K CONNECTED IN PARALLEL
D8 LED
D3 LED
C23 10UF
C18 .47UF
I don't liked this mod want to know if anyone knows the Keeley mod, please im from Chile and survived the earthquake STAND UP CHILE
http://farm3.static.flickr.com/2709/4398610914_7066ec2033_o.jpg
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zerksies
Double Platinum Member

USA
3406 Posts

Posted - 03/03/2010 :  03:54:06  Show Profile  Send zerksies an AOL message  Click to see zerksies's MSN Messenger address  Send zerksies a Yahoo! Message  Reply with Quote
quote:
Originally posted by jp_gentle

anybody have any ideas?
to get more gain with big/full/fat mod?

I would change D4 the LED to a 1n4002 diode
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