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DOD 250 mods

Started by Banjotaz, November 22, 2005, 11:11:09 AM

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Banjotaz


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I love the sound of this DOD mod I did. The DOD 250 and the MXR Distortion + are basically the same circuit. The MXR has 1N270 germanium diodes for more clipping and the DOD has the 4148 diodes for less clipping and more headroom. Also the MXR uses the 741 OP Amp and the DOD has the 4558 amp. I like the sound of the 4558 chip with the 1N270 diodes { this is also what the Ross distortion has} so I put those diodes in my DOD. Since those diodes reduce the amount of volume and headroom coming out of the unit I changed the output resister to 10K { it was 100K- {this is the re-issue I'm using} I also changed the incap to .005 {from .01} to eliminate low end mush. Changing the incap to ceramic also changes the tone a bit. The older MXR Distortion + pedals use ceramic caps and the reissues use the mylar film caps. The 250 also has an oscillation cap in the negative feedback loop which you can increase to roll off some more high end, or you can increase the vallue of the cap around the diodes to cut the shrill. I added a switch to my tone roll of cap 'cause at high gain it sounds better rolled off and at low gain it sounds more defined WITH the high end. All in all I really like this combination of parts and the 250 is a great pedal to mod!   :icon_wink: