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Projects => Tech Help - Projects Page => Topic started by: danwelsh on February 09, 2014, 01:48:35 PM

Title: wah not wahing(SOLVED)
Post by: danwelsh on February 09, 2014, 01:48:35 PM
Hi guys, so i figured i should post a new thread now that i got the buzz gone on my weener.....i have no wah effect whatsoever, it's just acting as a volume pedal???
Title: Re: wah not wahing
Post by: wgc on February 09, 2014, 05:03:58 PM
Check the transistor
Title: Re: wah not wahing
Post by: rullywowr on February 09, 2014, 06:16:33 PM
The inductor could also be shot. I've had this happen before.
Title: Re: wah not wahing
Post by: danwelsh on February 09, 2014, 06:38:11 PM
Quote from: rullywowr on February 09, 2014, 06:16:33 PM
The inductor could also be shot. I've had this happen before.

how would I test the inductor
Title: Re: wah not wahing
Post by: rullywowr on February 09, 2014, 07:58:24 PM
Im honestly not sure. I would swap a known working one to see if it makes it go.
Title: Re: wah not wahing
Post by: wgc on February 09, 2014, 11:57:12 PM
agree it could be the inductor too

A continuity check across the leads will show a broken coil, more precise measurement is a bit trickier

More likely you have a bad joint or trace somewhere inline with the inductor or transistor
Title: Re: wah not wahing
Post by: danwelsh on February 10, 2014, 01:14:20 AM
Quote from: wgc on February 09, 2014, 11:57:12 PM
agree it could be the inductor too

A continuity check across the leads will show a broken coil, more precise measurement is a bit trickier

More likely you have a bad joint or trace somewhere inline with the inductor or transistor

i have continuity between two of the inductor leads but not the other two....should i have continuity all the way around?
Title: Re: wah not wahing
Post by: Blues Healer on February 10, 2014, 07:01:09 AM
http://www.diystompboxes.com/smfforum/index.php?topic=83726.0
Title: Re: wah not wahing
Post by: Clayford on February 10, 2014, 02:55:08 PM
The inductor and it's traces are the first place to start looking, and it depends on which pins are continuous and which ones aren't. They usually have continuity in matching pairs
1 - 2
3 - 4

1&2 have continuity as well as 3&4
or
1&3 and 2&4

Depending on which inductor you have - you might need to rotate it 90° to get some "wah"
Title: Re: wah not wahing
Post by: wgc on February 11, 2014, 01:32:20 PM
Yeah, you might have it rotated 90 off.

Would be helpful to indicate what inductor you have if that doesn't fix it.
Title: Re: wah not wahing
Post by: danwelsh on February 11, 2014, 04:33:55 PM
okay guys, i'll let you know what happens after i rotate it.
Title: Re: wah not wahing
Post by: danwelsh on February 11, 2014, 09:11:55 PM
okay....so here's a picture of my inductor...i marked the two leads that have continuity together with a red marker, the other two don't have continuity....which way should this be positioned on the pcb? Or is my inductor shot?
Title: Re: wah not wahing
Post by: danwelsh on February 11, 2014, 09:52:45 PM
okay guys.....figured it out, my inductor is shot. :(
Title: Re: wah not wahing
Post by: danwelsh on February 23, 2014, 03:00:28 AM
Got my new inductor installed today.....and now i have wah effect....this is an awesome circuit :)
Title: Re: wah not wahing
Post by: jimilee on February 23, 2014, 03:14:43 AM
Quote from: danwelsh on February 11, 2014, 09:11:55 PM
okay....so here's a picture of my inductor...i marked the two leads that have continuity together with a red marker, the other two don't have continuity....which way should this be positioned on the pcb? Or is my inductor shot?
No continuity should have been soldered to circuit, continuity solder to the bottom 2 holes if you haven't figured it out by now in case the inductor is good.
Title: Re: wah not wahing
Post by: danwelsh on February 23, 2014, 03:27:02 AM
Quote from: jimilee on February 23, 2014, 03:14:43 AM
Quote from: danwelsh on February 11, 2014, 09:11:55 PM
okay....so here's a picture of my inductor...i marked the two leads that have continuity together with a red marker, the other two don't have continuity....which way should this be positioned on the pcb? Or is my inductor shot?
No continuity should have been soldered to circuit, continuity solder to the bottom 2 holes if you haven't figured it out by now in case the inductor is good.

No, i tried that inductor every way.....it's done for but i bought from from joe on the buy/sell thread on here and it's awesome
Title: Re: wah not wahing(SOLVED)
Post by: jimilee on February 23, 2014, 03:29:15 AM

Quote from: danwelsh on February 23, 2014, 03:27:02 AM
Quote from: jimilee on February 23, 2014, 03:14:43 AM
Quote from: danwelsh on February 11, 2014, 09:11:55 PM
okay....so here's a picture of my inductor...i marked the two leads that have continuity together with a red marker, the other two don't have continuity....which way should this be positioned on the pcb? Or is my inductor shot?
No continuity should have been soldered to circuit, continuity solder to the bottom 2 holes if you haven't figured it out by now in case the inductor is good.

No, i tried that inductor every way.....it's done for but i bought from from joe on the buy/sell thread on here and it's awesome
Me too. I got the 3 for 20. I used the terrible torroid. Love it.