Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

cant get wah pedal goin!
cant get wah pedal goin!
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 21st November 2006, 10:52 PM   #1
elementx is offline elementx  United States
diyAudio Member
 
elementx's Avatar
 
Join Date: Jul 2005
Location: Cleveland OH
Default cant get wah pedal goin!

I bought two non-working wah pedals from ebay in the hopes of fixing them up, and I'm getting nowhere! same problem on both...

One's an old crybaby wah, the others a GCB-95.

I've tested replaced all the parts on one board, tried new transistors, cleaned the pots, new wiring, tried different pots, no luck!

I get a pass through tone when i click the bypass switch, sounds fine. when i engage the pedal i just get a little static/hum. i can hear it change faintly when i rotate the pot (but nowhere near a full sweep change).

the inductor measures about 60-ohm (ok?)

any ideas? i need some insight!
i tried to check for broken traces/bridges, ill keep looking.


heres a schem. for one,
http://www.geocities.com/j4_student/crybaby95.gif
  Reply With Quote
Old 22nd November 2006, 07:24 AM   #2
mauerspecht is offline mauerspecht  Germany
diyAudio Member
 
Join Date: Sep 2006
I had that problem years ago when I put a homemade VOX like circuit in my Dunlop wah, but I forgot what fixed it.

But I guess it was basic tracing:

Verify that you have some voltage from the battery on the transitors.
The external power jack (if present) could be damaged by rude handling, causing a failure in the switch between external and battery power.

And check that the input and output are connected correctly.
  Reply With Quote

Reply


cant get wah pedal goin!Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
pedal lay out sheehanfan Instruments and Amps 0 18th March 2008 08:32 AM
Big Muff FX pedal cqboling Instruments and Amps 10 27th November 2006 02:05 AM
goin 2 visit maplin 4 a pcb kit got any ideas 4 a super newbie Sord_Fish Introductions 23 21st October 2004 09:44 AM
DIY Pedal Dwiel Instruments and Amps 1 17th September 2004 12:27 PM
odd little project i got goin Shpoop Multi-Way 6 17th July 2004 09:54 PM


New To Site? Need Help?

All times are GMT. The time now is 06:10 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki