Looking for Vintage DOD 250 Grey Schematic

Tom C.

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Sep 26, 2008, 10:31:20 AM9/26/08

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I recently acquired a vintage DOD 250 Grey, serial number 2500778 with the
LM741CM chip. Unfortunately, someone tried to replace the battery connector,
did a poor job, and the black lead has become disconnected. I need a
schematic to figure out where to connect the black battery lead to. Anybody
know where I can find the schematic fo this thing? I've already sent an
email to analogman but don't know if he'll reply or not. Thanks!

Here's the pedal in question:
http://www.youtube.com/watch?v=u4iCrvhQoto

Dr. Zontar

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Sep 26, 2008, 10:37:17 AM9/26/08

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I've seen it many times, but can't remember any URL's at the moment.
Do a google search. It's a fairly easy pedal to clone, so the
schematic is on a lot of DIY pedal sites.

- Rich

Tom C.

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Sep 26, 2008, 11:25:55 AM9/26/08

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Here it is:
http://www.freestompboxes.org/viewtopic.php?t=681
http://freeinfosociety.com/electronics/schematics/audio/dodoverdrive250.pdf

Geetar Dave

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Sep 26, 2008, 1:24:39 PM9/26/08

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On Sep 26, 10:31 am, "Tom C." <nos...@nospam.nul> wrote:

Attach a battery. Find a spot where the solder looks busted. See if
the light comes on when you touch the wire there.

-dave-----:::
www.myspace.com/geetardave

Jim

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Sep 26, 2008, 1:45:10 PM9/26/08

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I'm happy to help you out, I just gutted a yellow and rebuilt it to gray
specs. In return, I'd love to have high res pictures of both sides of
the board sent to jim at seattle (dash or minus sign) attorney dot com.

The black lead from the battery needs to go to the input jack. You
should see one wire soldered, and a spot on another terminal where yours
fell off. Attach there!

It uses a TRS type jack with the negative on one side. When you insert
the normal guitar cable, it completes the circuit!

The positive side goes to the power jack. When no power cable is
inserted, the jack makes the connection to the board. When a power
cable is inserted, it breaks the battery connection. It's an oddball
plug on the wallwart, but they do make an adapter if you can find a
suitable wallwart. I have the adapter, and I found a suitable wallwart
at a second hand shop.

Now, PLEASE send me the pics so I can see if we have identical circuits
or not. There were at least a couple of changes during the gray era,
then more changes in the early yellow.

The reissue uses 4558 and does NOT sound right. That's why I gutted mine...

Tom C.

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Sep 26, 2008, 2:48:59 PM9/26/08

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Kudos to analog mike who replied to my email the same day and told me where
to put the wire!!!

"Tom C." <nos...@nospam.nul> wrote in message
news:lj6Dk.38575$XT1....@bignews5.bellsouth.net...

Tom C.

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Sep 26, 2008, 2:50:04 PM9/26/08

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Hey, Jim. Sure, glad to help out. It may take me a while though... be
patient and I'll get you your pix.

"Jim" <j...@askmebeforeyousend.com> wrote in message
news:rfWdnWrRqOw8gkDV...@posted.isomediainc...

Jim

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Sep 26, 2008, 3:04:31 PM9/26/08

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Tom C. wrote:
> Hey, Jim. Sure, glad to help out. It may take me a while though... be
> patient and I'll get you your pix.

Thanks! I'll let you know if I've got the same circuit. I built mine
from schematics and what pictures I could find.