JH-F1 Hendrix Fuzz Face trimpots?

Discussion in 'Effects, Pedals, Strings & Things' started by Blues Jr, Oct 12, 2008.

  1. Blues Jr

    Blues Jr Supporting Member

    Messages:
    348
    Joined:
    Aug 22, 2006
    Location:
    Toronto
    I saw a thread awhile back that there were trimpots on the new Hendrix Fuzz Face. I just picked one up yesterday, and really like it so far. So where are these trimpots, and what do they do?
     
  2. soulsonic

    soulsonic Member

    Messages:
    982
    Joined:
    Nov 15, 2007
    Location:
    Port Jefferson Station, NY
    Don't touch them. They're for correct calibration in the factory. Not user adjustable.
     
  3. socal63

    socal63 Member

    Messages:
    210
    Joined:
    Jul 13, 2008
    Location:
    this week? Nashville
    hes right, thats what dunlop suggests, they are calibrated by scope to certain specs... i, on the other hand have a JH-F1 pedal thats got a great distortion quality to it but wasnt quite in the pocket, so i adjusted mine to suit my ears... i have figured out that i will probably never find another fuzz pedal that could ever compete with this thing... my fuzzface search is over.

    :AOK
     
  4. Blues Jr

    Blues Jr Supporting Member

    Messages:
    348
    Joined:
    Aug 22, 2006
    Location:
    Toronto
    OK, i can understand Dunlop not wanting anyone to play with those things. That being said, it's a nice option. I took a look inside and didn't see anything on the board though.
    Maybe mine doesn't have these trimpots?
     
  5. ptdesign

    ptdesign Handmade sonic art

    Messages:
    1,716
    Joined:
    May 13, 2006
    Location:
    S.F. Bay area
    The trims are on the underside of the board and are very sensitive (use care when probing).
     
  6. socal63

    socal63 Member

    Messages:
    210
    Joined:
    Jul 13, 2008
    Location:
    this week? Nashville

    i flipped it over and re-bolted it back down. use a small eyeglass flat head screwdriver to adjust.
     
  7. Fauxkinbacker

    Fauxkinbacker Member

    Messages:
    81
    Joined:
    Feb 14, 2008
    They set the bias of the 2 transistors. I think it's 1.72v on Q1 and 4.5v on Q2, both measured at the collector. Tweaking the values will change the sound quite a bit - www.geofx.com has an article called "technology of the Fuzz Face" that covers the voltage and bias issue.
     

Share This Page