madbeanpedals::forum

Projects => Build Reports => Topic started by: Chris McCullough on September 14, 2010, 03:31:32 PM

Title: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 14, 2010, 03:31:32 PM
(http://i829.photobucket.com/albums/zz216/guitarlaboratory/Effect%20Pedals/2010-09-14143137.jpg)
Title: Re: Latest Build using a Chunk Chunk board
Post by: jkokura on September 14, 2010, 04:12:06 PM
Cool image. I like the total disdain for 'naming' the pedal. Naming the functions in really small print is enough, and it looks mighty cool. Is the graphic from a cartoon you're a fan of?

Also, I hope your knobs are the 1/2" variety.

Jacob
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 14, 2010, 04:19:02 PM
I ordered 1/2" green knobs for it.
Title: Re: Latest Build using a Chunk Chunk board
Post by: pauloman80 on September 14, 2010, 07:40:56 PM
That is rad, man.  Nicely done.  I'm going to have to give those water slide decals a try.
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 14, 2010, 08:47:56 PM
Thanks guys.
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 14, 2010, 08:51:24 PM
My son likes the cartoon Invader Zim. Zim is the one on the pedal.
Title: Re: Latest Build using a Chunk Chunk board
Post by: gtr2 on September 14, 2010, 09:01:22 PM
Well executed design!  How about some gut shots :'(
Title: Re: Latest Build using a Chunk Chunk board
Post by: eniacmike on September 15, 2010, 08:17:35 AM
can you explain your bias process for the trim pots? I have tried a few different ways and I still can't get a good sound out.
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 15, 2010, 10:02:30 AM
Whats it doing? I followed the destructions and then tweaked by ear.
Title: Re: Latest Build using a Chunk Chunk board
Post by: eniacmike on September 15, 2010, 11:12:10 AM
oscillating like crazy, I either get completely clean sound or terrible oscillating crappy tone distorted sound. I tried 4.5v biasing and then adjusting from there, 1v biasing adjusting from there, pretty much every possible option and I can't get a good sound.
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 16, 2010, 04:09:33 PM
Make sure you have good solder joints. Make sure you don't any caps or resistors mixed up on the board. It is easy to get mixed up while putting this one together.
Title: Re: Latest Build using a Chunk Chunk board
Post by: madbean on September 16, 2010, 04:50:30 PM
Did you sub any different values for your pots, mike?
Title: Re: Latest Build using a Chunk Chunk board
Post by: eniacmike on September 16, 2010, 06:33:13 PM
no subs on the entire build.
I used the b5k potentiometer with a 5k1 resistor across lugs 3 and 1 for the mid control as it says in the instructions.

Title: Re: Latest Build using a Chunk Chunk board
Post by: eniacmike on September 16, 2010, 06:35:53 PM
I did just find 1n4001 instead of 1n4004 maybe that is my problem?
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 16, 2010, 06:44:57 PM
I used a 1N4007 and it worked just fine.
Title: Re: Latest Build using a Chunk Chunk board
Post by: gtr2 on September 18, 2010, 05:25:35 AM
Can you give us an updated pic when you get the knobs?   ;D
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 18, 2010, 03:36:33 PM
Sure can.
Title: Re: Latest Build using a Chunk Chunk board
Post by: eniacmike on September 18, 2010, 04:27:27 PM
it was definatley the diode causing my problems. I swapped it for 1n4004 and it works perfectly now thanks for the help.
Title: Re: Latest Build using a Chunk Chunk board
Post by: Chris McCullough on September 20, 2010, 05:14:07 PM
(http://i829.photobucket.com/albums/zz216/guitarlaboratory/Effect%20Pedals/DSCF7651.jpg)
Got the knobs in today.