Home › Forums › Help/Technical Questions › Can I use a Voodoo PP2+ to power the Holier Grail?

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  • July 25, 2010 at 11:24 pm #80535
    jamboree
    Member

    Hi, I have a quick question about the Holier Grail. I just picked one up for very cheap but it didn’t come with the power supply. The instructions state the adapter uses 18vdc 500ma. I have a reverse double ended 18/24v adapter for my PP2, but nothing is working. Does anyone know if the PP2+ is capable of powering this pedal? Or should I just order the ehx adapter from analogman?

    Thanks.

    July 25, 2010 at 11:29 pm #110486
    The EH Man
    Moderator

    The PP2+ is only capable of supplying 250ma on the high current outputs. You’ll have to use the original adapter or a higher current supplying power source.

    Not ripping on you or anything but really, you should be able to look up the specs of your own equipment. I found that info on Voodoo Lab’s site in less than 30 secs.

    July 26, 2010 at 12:03 am #110487
    jamboree
    Member
    Quote:
    The PP2+ is only capable of supplying 250ma on the high current outputs. You’ll have to use the original adapter or a higher current supplying power source.

    Not ripping on you or anything but really, you should be able to look up the specs of your own equipment. I found that info on Voodoo Lab’s site in less than 30 secs.

    Yeah I found the specs, but I thought it could ‘double’ the 250ma to 500ma if I used 2 outputs together. I just wanted confirmation from you guys before I shell out $20 for an adapter :(. Anyway, thanks for the quick response.

    July 26, 2010 at 12:38 am #110489
    The EH Man
    Moderator
    Quote:
    Quote:
    The PP2+ is only capable of supplying 250ma on the high current outputs. You’ll have to use the original adapter or a higher current supplying power source.

    Not ripping on you or anything but really, you should be able to look up the specs of your own equipment. I found that info on Voodoo Lab’s site in less than 30 secs.

    Yeah I found the specs, but I thought it could ‘double’ the 250ma to 500ma if I used 2 outputs together. I just wanted confirmation from you guys before I shell out $20 for an adapter :(. Anyway, thanks for the quick response.

    You might be able to do that. I don’t know how much actual current the Holier Grail draws, but it might be too close to 500mA for comfort.

    July 26, 2010 at 12:59 am #110490
    julian
    Moderator

    You should be able to do it with a Y adapter cable that Voodoo Labs sells for 18/24v pedals.

    Try it. Giving a pedal too little current isn’t going to hurt it.

    July 26, 2010 at 2:11 am #110491
    julian
    Moderator

    I’ve often found that pedals don’t actually need nearly as much current as their wall-wart supplies. For example, my HOG runs fine off of 250ma.

    July 28, 2010 at 9:13 pm #110536
    jamboree
    Member

    Thanks for the reply, Julian.

    So I ordered a 18V DC 500ma EHX adapter off ebay and got it in the mail today. I plugged everything in…and no lights are coming on, no signal, nothing. I opened the back of the pedal and everything seems normal, but I’m horrible with diagnosing problems.

    What could I do to remedy the problem without sending it in for repair? I guess the price I paid ($20) was too good to be true :(

    July 28, 2010 at 9:30 pm #110537
    jamboree
    Member

    update: bypass signal DOES work, but when the pedal is activated there is no signal. No lights are on either.

    July 28, 2010 at 9:32 pm #110538
    julian
    Moderator

    I’m wondering if it was possibly hooked up to the wrong polarity and burned out a part.

    Open it up and look inside. It could also be a loose wire. Or if something is burnt out, you can recognize which part needs to be replaced.

    July 30, 2010 at 12:49 am #110560
    jamboree
    Member

    I opened up the pedal but I don’t see any cracked resistors or burned out parts. Can anyone direct me which parts are common problems with this pedal? Thanks,

    holiercircuit.jpg

    link to image:

    http://home.comcast.net/~mineral/holiercircuit.jpg

    July 30, 2010 at 12:33 pm #110567
    The EH Man
    Moderator

    That’s probably why you got it so cheap.

    I can’t see anything wrong in the pics. You should take it to a tech for repair. Even if it costs you $50 to fix it that’s still a lot less than the pedal cost new.

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