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Nnew transformer for my MXR M-118?

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  • Nnew transformer for my MXR M-118?

    A while back I bought a vintage MXR M-118 analog delay pedal that was made for the US market. Since I live in Sweden, and we have different voltage(230V) coming through the socket, my plan was to change the transformer of the pedal to avoid extra paraphernalia when using the pedal.

    But my electronics knowledege is rudimentary at best, thus I need some help identify the proper values to look for in my new transformer.

    Some resources for you:
    Schematic: http://img.photobucket.com/albums/v4...nalogdelay.png
    Images of the pedal: Image 1, Image 2, Image 3
    Respone I got from Dunlop:
    The voltage needs to be dropped down to 15v and the 310L12 voltage regulator will drop it to 12v.
    After asking on a local forum I got some vague suggestions but nothing exact. The closest was a transformer with these values:
    Code:
    Effect:			0.5 VA
    Primary:		230 VAC, 50...60 Hz
    Secondary(auxiliary?):	12(2x) VAC
    So, any suggestions are welcome, and thanks in advance guys.

  • #2
    The circuit wants/needs 12VDC to operate. There are several ways to do this:

    1) Have a functioning unit that uses the right transformer to feed the on-board regulator.

    2) Feed the onboard regulator with an external DC adaptor, suitable for your country, that provides an acceptable DC output which compares to what the onboard transformer would normally provide.

    3) Bypass the regulator and provide your own regulated smooth 12vdc to the point o the board where the regulator's output would normally be.

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    • #3
      Hi Ohjay, Hey, I have the same pedal I'm trying to fix but I'm not too good with schematics. My problem is that some of the wires on the multipin connector (left in pic 2) have come off and I'm not sure where they go. Would you be kind enough to take a close up pic or 2 and describe where they are supposed to be soldered to? Thanx! I'd love to get this thing working again!

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      • #4
        Hi Spymaster, welcome to the forum.

        It looks like Ohjay only made the one post here in 2010 and apparently never cqame back, so I don;t think he will see your request. SOmeone else may be able to help.
        Education is what you're left with after you have forgotten what you have learned.

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