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Is there contact between the back of the pot and the diodes? That could be a culprit.

I 've checked for that but maybe I'll stick something in between that pot and the board to make sure.

What you are describing sounds like either one LED is in the wrong way or it is shorted to ground. Check to see if the LEDs are arranged back to back (can't tell from your pic). If you have a continuity checker, see if either LED has both ends connected to ground (which would indicate a short).

I looked for a flat spot on the LED's to make sure I had them in right but couldn't see one.  I'll check that out.

Me again, I recently finished this King Slayer 2015, had two problems, volume control didn't work and LED clipping sounds flubby.  I reflowed the solder joints on the volume control and it works now but the LED clipping is still flubby, very bassy and not very pleasing at all. 

Pics attached, any ideas anyone?  Did I use the wrong LED's?  I didn't have any square ones like in the build pics in the build doc.  This is fun but I wish one would just work right the first time





Thanks in advance for any help/suggestions.

It works, sounds pretty good.  This is a very high gain pedal!!

Your battery wires are also swapped, Red on (-), black on (+). (I realize you probably know this but it bugged me. Backwards!)

They weren't, there is a - right in front of the black wire and a + right in front of the red wire that can't be seen in the pictures.

Your battery wires are also swapped, Red on (-), black on (+). (I realize you probably know this but it bugged me. Backwards!)

I didn't see that, thank you.

It does I think, I played it a little thru a little amp I have on my workbench before I boxed it up but when I was boxing it up the ground wire broke off at the board.  I'll fix it tomorrow and try it thru a real amp.

So I was looking at these pictures and realized I have Q4 in backwards!!!  I must've looked at that 50 times already.

Pics here, let me know if you need anything else.

Can anyone help me here?

Hello again,

I'm testing my Chunk Chunk and it has extremely low volume when engaged.  I tried tracing the audio path with a tester that I made but it's very confusing for me.  It seems like the red lines supersede the blue lines so when a red trace and a blue trace are in the same place on the board, all I can see in the picture is the red one. Is there some trick to reading and understanding this or do you just have to do it enough to get good at it?

As an electronics newb at the age of 60 I have a couple questions. 

Can I test for the value of resistors and pots while they're soldered to the board?  Seems like it works sometimes but others no.  Same question for caps I guess.

Here's what my tracing has given me so far.  Signal is low at Q4, louder at Q1, louder stiil at Q2 and loudest at Q3.  Does this seem right?  All are biased close to 4.5V. 

The output from the volume control is very weak.  The gain control however is making the sound distorted and I can hear the tone controls changing the sound when I turn them.

I see it looks like sometimes caps and resistors will just be connected to ground on one side. For caps I think this is to bleed off certain frequencies but I could be wrong.  What does a resistor do in this case bleed off excess voltage?

Thanks,
Jack

The main problem is the part of the jack that clips into the groove around the tip of the plug.  Either I drilled wrong or there is an issue with the drill guide.  I turned the jack every way I could think of and there just isn't enough space between the board and the pots there and the front of the box for it to fit.

Lumberg jacks are the best option in this case but if you do another enclosure just do what I do and put the jacks either side of the 3pdt, look at all that space! I wire the jacks to the switch and the input for the effect in S and output in R. No need then to bother with the other pads for the jacks

I'll move them to the side and put some grommets or something in the holes on the end.

Here's the jacks I'm using.

I built a Chunk Chunk 2015 Edition and I can't get the jacks to fit in the enclosure with the board, if I put the board in first.  I can't get the board to go in, if I put the jacks in first.  What am I missing here?