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Noll TCM 3 Volume issue

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


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  1. 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
     
  5. May 13, 2019 #2
    Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    It sounds like you used the wrong value pot for your volume control.
     
  9. May 13, 2019 #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.
     
  13. May 14, 2019 #4
    wyrmspawn

    wyrmspawn

    Jul 25, 2011
    Ingelheim Germany
    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.
     
  18. May 14, 2019 #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.
     
  22. May 14, 2019 #6
    larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    I will thanks!

    Larry
     
  26. May 15, 2019 #7
    wyrmspawn

    wyrmspawn

    Jul 25, 2011
    Ingelheim Germany
    Do you use passive pickups?
     
  30. May 15, 2019 #8
    larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    Correct.
     
  34. May 15, 2019 #9
    wyrmspawn

    wyrmspawn

    Jul 25, 2011
    Ingelheim Germany
    What pot was installed before the noll?
     
  38. May 15, 2019 #10
    larrygs

    larrygs Supporting Member

    Jan 26, 2014
    Costa Rica
    The preamp came prewired with all pots, 250k Linear from stock.
     
  42. May 15, 2019 #11
    wyrmspawn

    wyrmspawn

    Jul 25, 2011
    Ingelheim Germany
    Mail Klaus Noll.
     
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