Results 1 to 6 of 6

Thread: Washburn B-200 Bass schematics

  1. #1
    New Member
    Join Date
    Sep 2014
    Posts
    2
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0

    Cool Washburn B-200 Bass schematics

    • Hello,
      Does anyone know the electrical wiring for an Washburn B-200 Bass.
      It has two Humbucker soap bar pickups, three photis and a 3 way switch.
      The Bass got modified somewhen. Once it was passive with active tone control?
      Now it is pure passive (no battery) and none of the potis work well.
      I like to restore it. Pickups seem to work fine.
      Any suggestions or improved wirings?
      THX, Dit

    0 Not allowed! Not allowed!

  2. #2

  3. #3
    New Member
    Join Date
    Sep 2014
    Posts
    2
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0
    Hi,
    Tanks for quick reply.
    I checked the links. Only I did not find a combination btw my pickups and the battery wiring. Hopefully I m not blind ;-)
    Some flyer said it was passive pickuped and active tone controlled. How should that work?
    Sorry for bothering.
    D

    0 Not allowed! Not allowed!

  4. #4

  5. #5
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    13,066
    Thumbs Up/Down
    Received: 606/3
    Given: 312/0
    Rep Power
    28
    Thanks VK.
    It is always a good thing to have guitar preamp schematics.
    They can be rarer than hen's teeth.

    0 Not allowed! Not allowed!

  6. #6
    Old Timer oc disorder's Avatar
    Join Date
    Jul 2006
    Location
    Land Down Under
    Posts
    1,268
    Thumbs Up/Down
    Received: 4/1
    Given: 1/0
    Rep Power
    15
    DIT .. I gather from your post the "photis" pots = potentiometers = variable resistors don't seem to work properly but both pickups are ok.
    From what you have figured out your bass may have had some sort of active eq i.e. a battery powered tone circuit which is no longer there.
    Hopefully I'm on the right track..correct me if I'm wrong.
    You don't mention scratchy or crackling when you turn the pots so I am assuming there is a possibility when the mystery circuit was added
    the pots were changed , as often, an active circuit requires the use of different values .
    For instance a typical Gibson humbucker guitar has 500k ohm pots and a typical fender single coil guitar has 250k ohm pots. (k= 1000 thus 250 k = 250,000 ohms).
    I have seen some active circuits where the value is as low as 10k.
    So maybe the pots were not changed back to the original values when the mystery active circuit was removed.
    See if you can see any numbering on the sides of the pots to indicate what value they are .. you may have to remove them to see
    To measure them with a multimeter set to ohms you would have to disconnect one of the side lugs/connectors.
    Does it look like someone has been in there and resoldered?

    And Jazz P Bass there are a few more here to keep you happy ;-) The Carvin Museum - Technical Documents

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Electro-Harmonix STEREO 200 schematics...
    By pecorporation in forum Schematic Requests
    Replies: 0
    Last Post: 07-21-2014, 09:33 PM
  2. AB 200 bass amp bias
    By Ran Randle in forum Maintenance, Troubleshooting & Repair
    Replies: 6
    Last Post: 06-17-2014, 07:18 PM
  3. Green Matamp Bass 200 schematics...
    By pecorporation in forum Schematic Requests
    Replies: 0
    Last Post: 06-12-2012, 04:31 PM
  4. peavey century 200 bass series
    By blaise in forum Maintenance, Troubleshooting & Repair
    Replies: 12
    Last Post: 05-02-2009, 12:53 AM
  5. celestion C15H-200 Bass Speaker
    By gils in forum Maintenance, Troubleshooting & Repair
    Replies: 0
    Last Post: 03-21-2008, 11:10 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •