Overdrive 250 |
The DOD Overdrive 250 clone can also be used to create an MXR Distorion Plus clone. See the project’s sources: http://tonepad.com and http://www.generalguitargadgets.com.
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Will Cote said:
Hey Gauss,
Is that a 50k reverse for the gain? I’ve mostly seen 500k reverse on these 250 ODs…just checking! Thanks for creating this site~ I’ve built several projects from here and they all kick arse!
Posted 03.10.2007 at 8:34 am
gaussmarkov said:
Will, you are a saint! Thanks for pointing that out. It’s my mistake and I will fix it immediately.
And thanks for the encouraging word!
Posted 03.10.2007 at 9:15 am
Gonzalo said:
Is there a particular reason for the 1M pull-up resistor instead of the 470k that was on the original?
Posted 31.03.2008 at 5:52 am
gaussmarkov said:
whether 470k or 1M is original depends on who you ask.
see generalguitargadgets and tonepad for differences of opinion. if you have an authoritative source for the value, please tell us.
imho it makes no discernible difference which value you use. this is because the the noninverting input of the op-amp has a very high impedance. the resistor is there to offset (or, as you say, “pull up”) that input to virtual ground, half the 9V supply.
thanks for asking!
Posted 31.03.2008 at 8:16 am
RedGuitar said:
hi gauss, fun to fine your website. i have finished my DOD250 through your schematics and sound is crazy great. but i still have an noise problem . why when i try to open drive to full gain, that is too much humming and noisy. can you tell me how to eliminating the noise withous NoiseGate tools. thank you before and after. sory about my english, i am from aceh - indonesia
Posted 10.07.2008 at 2:32 am