Need help with a Muff

[Elijah-Baley]

Like you said, I afraid the veroboard is verified and it must be correct.

The veroboard layout is based on this schematic: http://i50.tinypic.com/i59i52.gif.

With my experience I just can say the problem is a value of one (or more) resistor. You already verified the value of the caps, and if you are sure about them probably you're right.
If the wires are ok then... some mistake in the ground? Which make it sounds weird.
So, another test I would do is to check with the continuity test all the grounds looking the schematic, even another schematic cleaner than that I linked . Any will be good.

[jimilee]

A picture of both sides of your build would be most helpful, clear, close up and well lit.


Sent from my iPhone using Tapatalk

[bloxstompboxes]

It just occurs on lower notes so I guess it's fine with guitar, but I heard the Green Russian is the best Muff for bass, so at least I thought it should perform well on every note.

And yes, I did swap the transistors, but it didn't change anything. I looked at the schematic and the layout again and realised that lug 2 from the sustain pot should go to a 1u electro and then into a 8.2K resistor, but in the vero layout they're switched. I guess this doesn't matter, because the layout is verified?!

Order of the parts in a series connection of components doesn't matter at either end. Take a measurement or connection off the middle and it becomes important.

[stoiker]

Thanks, I really know shit about all this electronic stuff 

A picture of both sides of your build would be most helpful, clear, close up and well lit.


Sent from my iPhone using Tapatalk

I posted some pictures on the first page, I can't do any better.

[jimilee]

My bad, I overlooked them


Sent from my iPhone using Tapatalk

[stoiker]

@#$% it. I'm done. I checked the diodes, swapped all caps, swapped all trannies again, changed the pots, but it still sounds the same. I'll box it up anyway. Hooray for my new broken Muff    Maybe I'll buy a PCB someday and rebuild it. Thanks anyway, guys.

[Elijah-Baley]

Give it more time, if you are committing a mistake unawares you risk to repeat in another pedal.

It is your first pedal?

[stoiker]

No, I already build 7 pedals and some other noise makers, most of them on vero. I've had some trouble with one or another, but never needed that long to find errors.