Author Topic: My first efx pedal build  (Read 5101 times)

chromium

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My first efx pedal build
« on: November 19, 2012, 02:42:46 PM »
I've been goofing around a bit with aluminum transfers and etching - trying to learn how to put graphics and labeling on enclosures.  At the same time, I've been experimenting with some overdrive circuits on breadboard... 

Both efforts finally converged into this:








Here's a quick soundclip of it at volume through my Orange/SVT:


Already working on another design.  This is kind of addicting!  ;D

Highlander

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Re: My first efx pedal build
« Reply #1 on: November 19, 2012, 03:02:24 PM »
Kit-Kat chunky... ;D
The random mind of a Silver Surfer...
If research was easy, it wouldn't need doing...
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clankenstein

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Re: My first efx pedal build
« Reply #2 on: November 19, 2012, 04:24:33 PM »
mmm gnarly.
Louder bass!.

Nocturnal

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Re: My first efx pedal build
« Reply #3 on: November 19, 2012, 08:44:09 PM »
It sounds quite tasty thru my Genz/Peavey 4x12 rig too  :mrgreen:
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jumbodbassman

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Re: My first efx pedal build
« Reply #4 on: November 20, 2012, 09:36:37 AM »
sounds great.  a kit or just from  a schematic of the internet????
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Pilgrim

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Re: My first efx pedal build
« Reply #5 on: November 20, 2012, 10:28:42 AM »
I like the sound.  Nice sound variations demo'd in the video, too.
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ack1961

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Re: My first efx pedal build
« Reply #6 on: November 20, 2012, 12:12:13 PM »
Yeah, that's awesome.
I'd like to find out more about you came to build that box.
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chromium

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Re: My first efx pedal build
« Reply #7 on: November 20, 2012, 01:21:34 PM »
Thanks!  I actually built this one for Nokturnal/Andy as a b-day present (happy 29th, man!!).  He has long been a zombie movie aficionado, and so I thought some classic Night of the Living Dead graphics might be in order

This one was based on this schematic, and I built it on copper-clad prototyping board:
http://analogguru.an.ohost.de/193/schematics/Colorsound_ToneBender_RI.gif

The gain stage is copied pretty much verbatim, but I changed the tone circuit a bit.  The way it works is that the signal gets split and runs into both a low pass and high pass filter, and then the tone control balances between the two.  In the original, there is a much larger notch (sitting in the midrange) between the frequency points at which those filters begin to roll off.  I narrowed that notch to about a 1/4 of what it was, and the sound has more mids and more "grunt" as a result.

exiledarchangel

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Re: My first efx pedal build
« Reply #8 on: November 23, 2012, 03:03:55 AM »
Brilliant (pun intended)! Death to the living!!! :D
Music was better when ugly people were allowed to make it.

Highlander

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Re: My first efx pedal build
« Reply #9 on: November 23, 2012, 03:38:04 AM »
I'd forgotten that I'd built a small pre-amp circuit, even down to a custom etched board rather than "strips" and made it small enough to put into the original cavity of the PC - my original reason for minimising on the controls, so I could have the space to fit it... worked well enough during my metal days as it produced a rearl growl from the old original PC pups...

Long gone...
The random mind of a Silver Surfer...
If research was easy, it wouldn't need doing...
Staring at that event horizon is a dirty job, but someone has to do it; something's going to come back out of it one day...

godofthunder

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Re: My first efx pedal build
« Reply #10 on: November 29, 2012, 03:58:48 PM »
 :o Holy Crap I love that ! That sounds so f'ng cool, reminds me of Geezer. I really liked watching your pick technique, much like mine.
Maker of the Badbird Bridge, "intonation without modification" for your vintage Gibson Thunderbird

chromium

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Re: My first efx pedal build
« Reply #11 on: November 30, 2012, 12:58:44 PM »
:o Holy Crap I love that ! That sounds so f'ng cool, reminds me of Geezer. I really liked watching your pick technique, much like mine.

Thanks, Scott!  The Geezer thing is probably no coincidence - big Sabbath fan here.

I'm mostly a fingerstyle player out of habit, but still trying to correct that  8)  Half the time I can never find a pick, though, and so I end up doing what I did there - using my fingernail! 

I'm working on another, slightly more elaborate box now that will serve as a stereo bass overdrive and/or buffered splitter.  So rather than use a passive Ric-o-sound-type splitter, you can run a TRS (stereo) cable from a 4001/3, Magnum, etc... into it and add some grit independently to each pickup.  It'll then either mix the pickups together into a mono out, or let you send each pickup out of its own stereo output - to separate amps, or separate channels on a board. 



The overdrives will be roughly similar to that zombie fuzz above (but with switchable clipping diodes for different sounds), and each OD can be bypassed using those red-tipped switches (if I end up making more of these, the enclosure size will grow a bit to accommodate a pair of footswitches in place of the toggles). 

If used with a normal bass (mono), the blue switch at the bottom will selectively cascade the overdrives in series - so they can both chain together and process the mono signal.

I built that enclosure last week, and I still need to build up the final circuit on perfboard and finish the internals - hopefully this weekend.  I'll post some sound clips once I get it finished and have time to record it.

 :toast:

hieronymous

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Re: My first efx pedal build
« Reply #12 on: November 30, 2012, 10:49:46 PM »
Joe, both of these look great! Even though my Alembics are the only stereo basses I have on hand at the moment, I would be seriously tempted by the stereo box - if my 4003 lived with me on the left coast I'd order one in a heartbeat!

exiledarchangel

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Re: My first efx pedal build
« Reply #13 on: December 04, 2012, 05:23:11 AM »
I'd forgotten that I'd built a small pre-amp circuit, even down to a custom etched board rather than "strips" and made it small enough to put into the original cavity of the PC - my original reason for minimising on the controls, so I could have the space to fit it... worked well enough during my metal days as it produced a rearl growl from the old original PC pups...

Long gone...

What I was thinking those days, was building a preamp for my epi with gibby tb pups, with an active-passive switch ofcourse. I think it would sound devastating!
Music was better when ugly people were allowed to make it.

chromium

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Re: My first efx pedal build
« Reply #14 on: December 05, 2012, 08:51:23 AM »
Joe, both of these look great! Even though my Alembics are the only stereo basses I have on hand at the moment, I would be seriously tempted by the stereo box - if my 4003 lived with me on the left coast I'd order one in a heartbeat!

Thanks!  I wired up the enclosure last weekend, but I'm still using it with the circuit on breadboard (temporary/prototyping).  Playing around with different overdrive voicing for the neck and bridge pickups, and making some other improvements.  I think I have a manageable approach to building some enclosures (vinyl labels on powdercoated enclosures, buried in clear, buffed out), and if all goes well I might get some boards printed for both a mono and stereo version.  We'll see...

I'd forgotten that I'd built a small pre-amp circuit, even down to a custom etched board rather than "strips" and made it small enough to put into the original cavity of the PC - my original reason for minimising on the controls, so I could have the space to fit it... worked well enough during my metal days as it produced a rearl growl from the old original PC pups...

Long gone...
What I was thinking those days, was building a preamp for my epi with gibby tb pups, with an active-passive switch ofcourse. I think it would sound devastating!

That would be a cool project.  That old BC Rich I picked up has a great sounding, simple little 2N5088-based pre and varitone circuit on a board...

I'm still really green at it, but I've done a couple projects with software called KiCAD and like it a lot.  It'll let you draw up your circuit, run tests/simulations, and layout the printed circuit board artwork (...and its all open source!):
http://www.kicad-pcb.org/display/KICAD/KiCad+EDA+Software+Suite

Places like PCBCart can take those files and run off the boards for you, or you can just use them to do the print/toner-mask/etch/drill on your own.