>

Need Help: Jcm800 4210 Potentiometer

Discussion in 'The Workbench' started by parachute, Jan 26, 2017.

  1. parachute

    parachute Member

    Joined:
    Jul 23, 2015
    Messages:
    46
    Likes Received:
    43
    Hello everyone,

    I have a JCM800 4210 (year 1983). I need to replace the potentiometers. But I don't know the right values. Can anyone help?

    Thanks a lot in advance
     
  2. JCarno

    JCarno Well-Known Member

    Joined:
    Jun 30, 2010
    Messages:
    1,401
    Likes Received:
    582
    Location:
    Finger Lakes
  3. Matt_Krush

    Matt_Krush Well-Known Member

    Joined:
    Dec 14, 2015
    Messages:
    1,265
    Likes Received:
    1,042
    Location:
    Saginaw MI
    You can look up a schematic (DrTube.com), a layout (MojoTone.com), look on the back of the existing pots...or measure them.
    Be sure to use audio taper (log taper) for the gain/volume pots. You can use linear or log for tone controls...read the pro's and con's for linear vs log taper to help you decide. Some prefer one over the other.
     

Share This Page