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fancy pants
Copper Member
USA
30 Posts |
 Posted - 01/20/2009 : 09:08:27
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I visited the Keeley link about the DD-3 mods. I'm not very schematic savvy and can't figure out how to perform the mods listed in the link.
Anyone done these mods? could you provide some photos of mod instructions? |
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fancy pants
Copper Member
USA
30 Posts |
Posted - 01/20/2009 : 21:50:43
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"The no-brainer is just attaching a cap to a feedback loop. On the DD3 by BOSS you can tack the capacitor across the outside terminals of the E. LEVEL control (VR3 on the schematic)."
Does this mean putting the to legs of the cap on the two outside legs of the Effect level pot? |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/21/2009 : 16:04:38
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quote:
Originally posted by fancy pants
"The no-brainer is just attaching a cap to a feedback loop. On the DD3 by BOSS you can tack the capacitor across the outside terminals of the E. LEVEL control (VR3 on the schematic)."
Does this mean putting the to legs of the cap on the two outside legs of the Effect level pot?
Hi fancy pants
Yes that's exactly what it means, I think Christo, posted a pic of this mod many months back.
There is (8) or more, repair & requests for help, running on the forum at the moment.
And some a real brain busters, I have reading schematics for a few, in my spare time, trying to figure out what to type to some people.
How did you go with this mod?
If you haven't done it yet, use a small cap (smallest you can buy), 16V is ok if you can get one that small.
It makes the job neater.
Although 50V caps are probably more common, depends on your electronics supplier.
How are you with a soldering iron?
Just be careful you don't overstress the cable or Ribbon cable.
Regards Dr. Bob
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fancy pants
Copper Member
USA
30 Posts |
Posted - 01/22/2009 : 21:13:10
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Hey Dr. Bob,
So I found that a 0.1 and 0.22uf caps work quite well. I didn't have a .47 as Keeley suggested but I did have two .22, so I connected those in parallel and found that value to be too much so I stuck with .22
The effect on the sounds its pretty nice, it's an introduction into voicing digital pedals more toward the analog spectrum - what has been a popular trend lately with a lot of builders.
I'm going to try the other mods suggested in the keeley link, in particular the diodes mode which could get some grainyness and "tape compression" sounds. I'll report back on that.
As anyone here successfully performed the effets loop mod? I have a MIJ DD-3 that I had a guy mod for me but I've been unable to reverse engineer it to apply to my MIT because they're a little different. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/23/2009 : 08:01:52
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Hi fancy pants
That's good news,
I guess we will now, all wait & see what other mods, you are about to do.
Keep up the good work.
Feel free to post pictures of your work.
Regards Dr. Bob
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fancy pants
Copper Member
USA
30 Posts |
Posted - 01/23/2009 : 08:10:26
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Dr. B,
Yeah if you come across any other mods, in particular info on the effects loop mod, that would be great.
I can try and post some pics but it's a pretty straight forward job.
I at first used a DPDT center off switch but dropped that because it was too big. I got a SPDT center off switch and did as follows:
Attached one leg of the capacitors to each other, the other remaining legs of the caps went to the two other switch lugs. One wire from the pot went to the center lug on the switch and the other wire was attached to the two joined legs of the caps.
Hope that helps |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/23/2009 : 12:05:48
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Hi fancy pants
I was really more interested in the pics, for the new members here.
Some would love to mod their various pedals,
but need more of a visual reference, rather than just the circuit references & component valves.
Like the old saying: "A picture is worth a thousand words".
fancy pants, where did you hear-read about the effects loop mod?
I have not heard of this mod myself.
Are you able to explain, what this mod does?
Regards Dr. Bob |
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fancy pants
Copper Member
USA
30 Posts |
Posted - 01/23/2009 : 16:02:51
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http://www.robertkeeley.com/product.php?id=41
The mod allows you to put effects into the repeats of the delay, thus creating modulated delays, etc.
Someone posted some info here about the mod maybe a year ago which I attempted but with no luck.
The instructions they gave corresponded to the Made In Japan PCB layout (which I have). I tried the mod but it didn't work. I had a guy online do the mod for me.
What I should do is take pictures and document the mod process and post the details here and hopefully someone can translate that info into how to apply it to the Made In Taiwan versions, which I think are a little different layout wise.
I'll try and get those pics of the mod soon.
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Topic |
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Help with DD-3 mods
