MXR Distortion + schematic question

[deadregan]

I was wondering if anyone has a schematic for the MXR distorion + pedal that shows which pins are being used by which components. i have a scheme from R.G. Keen but it does not have the pins numbered. please help.

[Gringo]

Have you seen tonepad's project:

http://www.tonepad.com/project.asp?id=2

If you want to know wich pin is which, you can do a search for the datasheet of whatever op amp you plan to use.

[petemoore]

Suggestion to consider...
 http://www.muzique.com/lab/sat.htm
 I put the 'twangy bite' Saturation control on mine [didn't try others].
 I found this little addidtion really helps open up the tone of the pedal, can increases output, and softens the harshness of the clipping, and makes it a more adjustable effect.

[deadregan]

I just need someone to tell which pins are used for what. i know you dont use 1, 5, or 8 but the chip has two inputs and i do not know which one is used.

[Jason Stout]

Look at this schematic.

This is a good schematic and it also includes the pin numbers. If you follow the traces from the opamp, you will run into the components that connect to each pin.

[spongebob]

Here's the datasheet, pinout is right on the first page:
http://www.national.com/ds/LM/LM741.pdf

[john1056]

Watch the pot values, the tonepad ones aren't the best!  Search for the article "MXR Distortion Plus Questions" for more info.

[Fret Wire]

Factory spec is 50k log for Output (volume) and 500k rev. log for Distortion. You can go up to 100k log on the Output for more volume.

[petemoore]

For each a single OA output, there will be  - [neg] and a + [pos] input...marked on the schematic ... in the triangle [the opamp] look for - and + signs.
 Match these - and + input signs to the OA - and + signs.
 pin 2 is the inverting input on a 741 [single type] or -
 Pin 3 is the non- inverting

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