Saturday, 26 August 2023

MXR Micro Amp Plus

 Schematic is avaible HERE.

 



12 comments:

  1. Great! Been waiting for this for months to be published. Thanks a lot Anders!

    ReplyDelete
  2. I just tracked it. And it seems ok.

    ReplyDelete
  3. Tagged!! Cheers Anders, this is a great pedal

    ReplyDelete
  4. I've tried a B500K, C500K and an A500K and they all do nothing until the last quarter (from 3 o clock onwards). Is there anyway to even things out, or start more into the turn (if you know what I mean). Thanks!!!

    ReplyDelete
    Replies
    1. From all the demos online, it seems like a pretty ungainy pedal even maxed out. Try upping the 2k7 resistor (L2–O2) to set the minimum resistance to ground higher. Start with something that might be overkill (e.g. 100k) and work down, perhaps?

      Delete
    2. Cheers Sebastian, I will have a play around

      Delete
    3. Try another 500kC perhaps? Or a smaller value like 50k-25k?

      Delete
    4. Good idea, will try that first

      Delete
    5. Used a B50K in the end but probably could have got away with a little lower. Used B20K for both treble and bass and its good!!

      Delete
  5. Can anyone help with the offboard wiring? Cant seem to make it work. I traced pretty much everything on the board and its exactly as shown. I am guessing its the offboard wiring thats causing some weird issue with input? Any help will be appreciated

    ReplyDelete
    Replies
    1. Check this out, it should help

      https://tagboardeffects.blogspot.com/2012/02/offboard-wiring.html

      Delete