Jump to content
Why become a member? ×

EH Big Muff Issue


Recommended Posts

Hi,

Looking for some guidance here. My father passed on his Big Muff for me to have a look at as there is are loud whine whenever there is power to the pedal. This happens with both mains and battery. You can hear the effect through the noise although not in the video.

Does anyone have any idea what may be causing this problem?

Cheers

cameringo_20200511_231008.jpg

cameringo_20200511_231826.jpg

Edited by Groove Harder
Link to comment
Share on other sites

Sounds like some high speed motor boating is going on.

One of the op-amps oscillating? 

Suggests decoupling caps are faulty (or op-amp is blown).

Check the soldering for dry joints (big cap bottom left corner in the underside looks a bit blobby).

Gently wiggle the cables... any crackles?

Lift one leg on the caps (green ones and electrolytics) and put a cap tester on them.

Otherwise you need a 'scope and follow a signal through.

  • Thanks 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...