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Noll TCM 3 Volume issue

Discussion in 'Pickups & Electronics [BG]' started by larrygs, May 11, 2019.


  1. larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    Any of you use this same preamp?

    Let's say volume goes from 1 to 10 on the volume pot, when you turn the pot, only from 9 to 10 go get volume, less than that there is no volume at all.
    It came with a Linear Taper Volume pot, so thinking it was the pot I replace it with an Audio Taper Volume pot. Same result.

    I just want to know if this is normal with this preamp or there is something defective.

    It came prewired, but when I replaced the pot I did follow this diagram:

    http://noll-electronic.de/files/a25_tcm3_wiring_diagram.pdf

    Thanks!

    Larry
     
  2. Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    It sounds like you used the wrong value pot for your volume control.
     
  3. larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    250k just like the stock one, still the original and the replacement are the same value and I get the same result.
     
  4. I have no problem with my tcm2's volume pot. I had the same problem with bad or uneven volume regulation using a 1 meg pot and truly very hot pup.
     
  5. mustBmtd

    mustBmtd Supporting Member

    Sep 28, 2012
    Tennessee
    If you haven't gotten any results yet. Check with my friend fruitlabor. He knows these preamps really well.
     
  6. larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    I will thanks!

    Larry
     
  7. Do you use passive pickups?
     
  8. larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    Correct.
     
  9. What pot was installed before the noll?
     
  10. larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    The preamp came prewired with all pots, 250k Linear from stock.
     
  11. Mail Klaus Noll.
     

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