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  • October 30, 2012 at 10:14 am in reply to: Soul Preacher Nano, issue with power splitter. #118341
    mrelwood
    Member

    I bought the pedal used, and since it seemed to work perfectly alone, I said okay and closed the deal. This is the pedal I now have, and I do like the sound and the attack on a bass, so I don’t think there is a reason to go hunting for another compressor. I have built a few pedals of my own, so I’m not at all against fixing what is broken.

    I would like to hear from EH staff wether this is an expected behavior or not.

    If some of you have the Soul Preacher Nano and a splitter power cable, I would appreciate if you could do this quick test:
    – Play with only the Soul Preacher connected to the splitter power cable and make note of the audible volume level.
    – Insert a nail or anything metal in another DC jack of the splitter cable, and touch the cover of the Soul Preacher with the nail.
    – Check wether the output volume of the Soul Preacher gets higher or not.

    October 29, 2012 at 6:08 pm in reply to: Soul Preacher Nano, issue with power splitter. #118334
    mrelwood
    Member
    Quote:
    It may be an issue with your amp, it could be one of the pedals you’re using has something feeding into the grounds, it could be loose winding on your pickups
    …
    But I’d be hesitant to dismiss a pedal when it could be something else entirely.

    Sorry, I don’t mean to be dismissive, but no it couldn’t.

    The issue appears when using any of my instruments, all of which have had their electronics rebuilt by a professional guitar tech, and which all work flawlessly on all systems I use them on. The change of volume is also clearly apparent when there is no instrument connected to the Soul Preacher input, only a cable with the other end free.
    ->
    Sould Preacher Nano powered by 1Spot (tried two of them) and a splitter cable. The splitter cable is working flawlessly with all other pedals, and using a multimeter to measure the connectivity, the connections appear as expected.
    ->
    Soundcraft mixing desk instrument input, MOTU Traveler MKIII instrument input, or another FX pedal.

    The voltage output of the 1Spot dropped only by 0.01V when adding the other device to the splitter cable, so the performance of the power supply is not an issue. The issue can also be launched by just temporarely connecting one of the splitter cable’s DC plug’s center (power minus) to the Soul Preacher casing. Or doing that internally in the Soul Preacher.

    So yes, it is the power supply section of the Soul Preacher that is the issue here. It doesn’t expect the power minus to be connected to signal ground, which is usual practice when building pedals. Soul Preacher Vintage does it, if the schematics I saw are correct.

    October 29, 2012 at 4:47 pm in reply to: Soul Preacher Nano, issue with power splitter. #118332
    mrelwood
    Member
    Quote:
    haven’t heard of this being an issue before. what other pedals are you running?

    Seems to be an issue with any pedal I have. For example Korg PitchBlack. I noticed that just connecting the power minus to signal ground on any of the splitter cable causes the issue, no other pedal needed.

    Almost all pedals connect the power minus to ground, so if this really hasn’t been an issue for anyone else, my pedal is broken. I really wish there was a schematic I could have a look at. That way I could determine what’s going on.

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