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ESP Ltd B-50 grounding problem

Discussion in 'Pickups & Electronics [BG]' started by Mickkey, Jan 15, 2013.

  1. Mickkey


    Jan 15, 2013
    Hello all. I have been lurking around the board for about two years now, but never had anything to contribute witch is why this is my first post/thread.

    I have encountered however a problem with wich I cannot deal myself. I have been doing a lot of online searching and nothing sprang up.

    I have decided to build a Tillman F-fet preamp for my bass and swap the tone boost with the preamp. Everything turned out great, the bass sounded awesome and I was very happy.

    This is the freaky part. After installing the preamp I tested it and it worked. After that I played for half the night and everything was great - not a single problem. I packed the bass into a gig bag in the morning, took it with me to another city, never took the bass out for a week, came back with it and plugged it in to the same amp I was playing when testing. This time the bass sounded weird. I am now un-happy.

    I'm not sure it's the grounding because touching the strings and bridge does not change the buzzing. It almost seems as if the pickups are overly sensitive because if I touch the A and E strings veeery lightly the buzz starts. As if the slightest vibration of the strings is being picked-up.
    Also the signal is about half as loud as it was.

    I have tried it on a decaying battery, on a new battery (both measured), without the whole pre-amp, with a new pot and without the pot (signal and bridge/ground straight into jack).
    The only time the bass acted o.k.was with the 'no-pot' option.
    The moment I solder the bridge/ground onto the pot, from the pot a wire into the jack - buzz. No difference at all with or without the pre-amp. Only thing is that with the pre-amp and no battery there is almost no sound at all witch is as should be.

    There is also this : since this buzz thing started there is this soft popping sound when the pot goes all the way up or down.

    I now have no idea what could of happened and decided to seek (& destroy;)) help. If any one here has any ideas at all please help me out. I live in Poland so if do not reply right away it might be because of the time difference.

    Thanks and cheers !
  2. Mickkey


    Jan 15, 2013
  3. bassburner


    Dec 8, 2008
    I'm not an expert but when I had this problem or a different all-passive bass, it turned out the ground to the jack came loose while I was messing around with other stuff.