Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Preamps and Effects => Topic started by: LJN on March 13, 2016, 03:47:24 AM

Title: Found some inductors. Any good for a wah pedal?
Post by: LJN on March 13, 2016, 03:47:24 AM
Hey, guys. The other day, I pulled some circuit boards from an old non working Kimball organ. There are four inductors and I'm curious as to whether they're useable in a wah pedal. They kinda resemble what I've seen in pictures of some vintage pedals. Thanks.
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: LJN on March 13, 2016, 04:07:14 AM
They have numbers on them, too. Two of them say ".35H" , one of them says ".80H" and the fourth one says "1.8H". I haven't pulled them from the boards yet, so I've no idea about their resistance.
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: Enzo on March 13, 2016, 04:40:58 AM
Resistance isn't the issue.  They are marked with their inductance, so look at circuits you might want to use them in and compare.
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: LJN on March 13, 2016, 04:45:09 AM
Well, I was thinking about trying one in my Vox V847 wah pedal. I've been wanting to finish upgrading it to more of a classic sound. It's still running the stock MPSA18 transistors and the original pot. The only upgrade I don't want to do is true bypass. Thanks.
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: LJN on March 15, 2016, 11:03:42 PM
I finally tried all four of those inductors in my wah pedal and the 1.8H was the one that sounded best. It has a very strong, vocal like quality and sounds almost like Hendrix!
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: LJN on March 16, 2016, 02:24:31 AM
Here's the circuit board with the "new" inductor. I had to tweak the value of that cap between the inductor and Q2's emitter, but on the third attempt I found the sweet spot with a .0082uf cap. The tone and sweep of the pedal with these mods is just awesome. <3)
I've never enjoyed using any wah this much!  :dbtu:
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: J M Fahey on March 16, 2016, 11:42:10 AM
Hey !!! Congratulations !!!!!  :dbtu:
Title: Re: Found some inductors. Any good for a wah pedal?
Post by: LJN on March 16, 2016, 03:14:12 PM
Thanks, Juan. And a big thanks to the others who offered advice to point me in the right direction!  :tu: