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madbeanpedals::forum

Projects => Build Reports => Topic started by: EBK on October 22, 2018, 04:11:03 PM

Title: I've managed to build something from my to-do pile.
Post by: EBK on October 22, 2018, 04:11:03 PM
My 6-year-old daughter painted this for me a while ago, and I've finally assembled it.

(http://i.imgur.com/aCaOSaxl.jpg)
(http://i.imgur.com/TGurAnBm.jpg)
(http://i.imgur.com/SXZIJg7l.jpg)

It's a Tonebender MkI from pickdropper.  I still need to learn how to properly bias it, but it works.
Title: Re: I've managed to build something from my to-do pile.
Post by: ahiddentableau on October 22, 2018, 04:17:11 PM
I'm trying to decide whether your daughter loves rainbows, is already a screaming hippie, or is regularly taken to Grateful Dead shows.  In any of those cases, I approve!
Title: Re: I've managed to build something from my to-do pile.
Post by: jimilee on October 22, 2018, 05:11:26 PM
That's fantastic!!! I will always cherish the ones my daughter did. She even built an EM drive on Beto when she was 9. Good times.


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Title: Re: I've managed to build something from my to-do pile.
Post by: Leevibe on October 22, 2018, 05:31:25 PM
Awesome!
Title: Re: I've managed to build something from my to-do pile.
Post by: EBK on October 22, 2018, 06:03:43 PM
This thing is a very splattery sounding fuzz, but I've read that may be part of the MkI's "charm".
Title: Re: I've managed to build something from my to-do pile.
Post by: jjjimi84 on October 22, 2018, 07:09:28 PM
I love that! I try to involve my little guy as much as possible, so to see something like this makes me smile. Awesome painting and a super neat build.
Title: Re: I've managed to build something from my to-do pile.
Post by: Bret608 on October 23, 2018, 08:48:19 PM
This is awesome! I'm just gearing up to post my first daddy-daughter collaborative build report as well...

The MkI is definitely aggressive and can be a bit sputtery. In terms of bias, here a couple of notes from a build I did a while back as well as way too much research on the various forums:

Q1: The collector will be quite close to supply voltage; you may also have some small voltage on the emitter and that's okay.
Q2: The attack pot is actually a bias control; for this one you want to vary from about 7 or 8 volts at counterclockwise and anywhere from 2 to 4 volts at full clockwise on the collector. The range you get will matter for where the sweet spots are; expect some gating as well.
Q3: The collector will be around 8.5 volts or less if you transistor has leakage (which is a good thing). The less voltage you have here, the more sustain there will be. Since you have the trimmer, you should be able to dial it in to taste!  :)

I hope this is helpful!
Title: Re: I've managed to build something from my to-do pile.
Post by: EBK on October 23, 2018, 09:41:22 PM
Quote from: Bret608 on October 23, 2018, 08:48:19 PM
I hope this is helpful!
Immensley! Thanks!

I haven't done a demo of the pedal for my daughter yet, but she seemed really excited when I told her it makes a guitar sound a little bit like a kazoo.  ;D
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