18 thoughts on “Request: Brunetti Mercury

  1. Gilmar,
    It could be any number of things. I suggest you check out the “debugging” page to start off. You will hopefully get a few tips that can help you solve the problem.
    (From my experience when these things happen, 95% of the time I did a small mistake or two, and it’s often an obvious mistake that I’ve overlooked).

  2. Hello Harald, I used for capacitors in nanofarad metallized polyester ones, but I have no sound when activated the switch, I double checked everything but do not know what the problem is …
    could you help me?

  3. I used 2N5457 instead J201 and found the produkt more usable but with less power.

  4. Hi, thanks for all the work with the layouts! I have a small question. Which two of the four 22 k resistors in the mercury drive should be replaced for trimpots if I want to bias the jfets? I have read on freestompboxes that this is a good thing to do but I don’t have the knowledge to locate the drain resistors myself. Thanks in advance!

  5. Hi James! A great starting place would be R.G.Keen’s debugging pages over at http://www.geofex.com (upper left-hand corner). Both forums have lots of discussions on debugging as well, but you might have to dig a little.

  6. Hi Guys

    I’m new building my own pedals i made the Maxon OD808 and was much surprised and pleased to hear it working first try !!!!

    i am now attempting the Brunetti Mercury i have the board finished but the volume is very low (almost none existent), i have gone over the placing of the components, jumpers and cuts and all look OK ??

    I have got no idea how to go about troubleshooting faults, if anyone can offer any advice it would be much appreciated.

  7. Just finished with 1N4148… great, really modern distortion! 🙂

  8. These diodes is part of the voltage doubling circuitry and thus shouldn’t play a major role in the sound that you get. BAT41 should be just fine and you can probably also use regular ones like 1N914/1N4148 with the only result being a very slight lowering of the working voltage (because of voltage drop across the diodes).

  9. What can I use instead of BAT85s? 🙂 I’d like to obtain the most faithful sound 😉 (I have three spare bat41, are they useful?)

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