Confusing Tone Pot sweep(Jazz Wiring)

Discussion in 'Pickups & Electronics [BG]' started by heavyfunkmachin, Jan 16, 2013.


  1. heavyfunkmachin

    heavyfunkmachin

    Joined:
    Jan 21, 2005
    Messages:
    869
    AFAIK... best results for Jazz bass pots are linear volumes and audio taper (log) tone pot, this is supoused to give a nice volume sweep when playing clean uncompressed sounds and a usefull tone range.

    Last night I re-did the wiring on a jazz bass, I tried a 500k pot in volume position, it was supoused to be an audio taper pot as described by the ebay seller as I later checked, to find out that most of the volume was in the final 8-10 turn instead of evenly distributed.

    "OK, dumb me, this is an audio/log volume pot" so it's uneven in volume, let's use it for the tone pot. But to my surprise, when wired as a tone pot most of the highs reduction happens in the first 0-2 range!!

    What's going on?
    A suppoused audio/log pot gives uneven volume (volume jump from 8 to 10) AND uneven tone (Brightness jump, from 0-2 it works, but from 2 to 10 it does little or nothing for the tone sweep) :confused:
     
  2. SGD Lutherie

    SGD Lutherie Banned

    Joined:
    Aug 21, 2008
    Messages:
    10,388
    Location:
    Bloomfield, NJ
    Disclosures:
    Owner, SGD Music Products
    What brand pot is it? A lot of audio or log taper pots are not really log taper, but a composite of linear tapers. Some brands are better than others.

    Also look at the pot and see if it says A500K or B500K (A=Audio, B=Linear).
     
  3. heavyfunkmachin

    heavyfunkmachin

    Joined:
    Jan 21, 2005
    Messages:
    869
    It's a chinese pot from ebay :bag: no marking other than 500k...

    But what I find confusing is that it behaves as an audio pot when used as volume and like a linear when used as tone pot
     

Share This Page