Results 1 to 2 of 2

Thread: Distorted/buzzy sounds on Wurlitzer 950

  1. #1
    ppp Pianississmo chrisn9008's Avatar
    Join Date
    Mar 2014
    Location
    Preston Lancashire UK
    Posts
    46

    Distorted/buzzy sounds on Wurlitzer 950

    Hi
    I have a Wurlitzer 950 that is making a distoted/buzzy type sound on the straight channels. It does it at any volume so I dont think it is a speaker issue. Anyone got any idea what it may be?
    Thanks
    Chris

  2. #2
    p Piano Lucien Nunes's Avatar
    Join Date
    Dec 2008
    Location
    London UK
    Posts
    219

    #1. Try pressing the full/low volume switch in and out a few times. If you've never used it, it's under the keydesk at the treble end next to the headphone jack. If the contacts get tarnished, they can cause weird clippy distortion.
    #2. Switch off the presence modulator by putting the appropriate tabs down. The complex voices will now be thin, but might be clean. If so, the problem is likely to be in the presence modulator. Two versions were made, the earlier one with the Panasonic ICs is more prone to distortion and noise problems.
    #3. With the presence modulator on, the complex voices are amplified through the main channel and both presence channels, while the reverb output also goes through the Leslie. If you listen around the speaker grille, you can hear the output of the different channels from the different drive units. Are they all bad, including the reverb sound from the Leslie and the one in the treble end of the console?

    What is your level of electronic troubleshooting experience? Are you familiar with using a multimeter or reading a schematic? Do you have the service manual? The problem could be anything from bad capacitors to faulty analog switch ICs to ripple on the DC supplies.

Similar Threads

  1. Wurlitzer 630TA distorted sound
    By chrisn9008 in forum Home Organs
    Replies: 13
    Last Post: 06-13-2016, 03:32 PM
  2. E-100 sounds heavily distorted
    By M-111 in forum Hammond Organs
    Replies: 4
    Last Post: 07-10-2015, 10:19 PM
  3. Wurlitzer 950 TA
    By Suzan in forum Theatre Electronic Organs
    Replies: 4
    Last Post: 12-25-2012, 11:01 AM
  4. Free Wurlitzer Columbus Ohio Craigslist, Like a 950, but not a 950...
    By paulj0557 in forum Buy & Sell Church & Classic Organs Archive
    Replies: 3
    Last Post: 05-23-2011, 04:58 PM
  5. Wurlitzer 950-TA
    By tom-total in forum Theatre Electronic Organs
    Replies: 0
    Last Post: 09-22-2007, 11:14 PM

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
  •