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I did quite a bit of work on a Ringer layout a year or so ago. I should open that back up and take a look at it.

He looks board.

Lowering R46 to 68k should make a significant difference. I would socket that resistor while you are at it so you can try other values.

If it is still not enough, increasing R29 from 27k to 47k or 68k will give you more output.

I would stick with the Klon buffer. There's nothing wrong with the FatPants one, but you already have one with the Klon so it is not needed.

You probably want to put your fuzz pedal first in you pedal chain.

I only know of it by proxy. My bandmate had a FullDrive for about 10 years and it crapped out. He sent it back and they supposedly repaired it. Got it back, no good. Contacted them again and the replaced it at no charge. That's pretty good service.

But, yeah, there are plenty of not so good stories out there.

http://www.madbeanpedals.com/forum/index.php?board=57.0

I'll start a little forum sub-section for the course. We can have discussions on the material, pose questions, etc. I would not worry too much about any maths. While I've forgotten probably 90% of whatever I learned earning my college math degree, I can at least point anyone in the right direction when it comes to problem solving. I'm sure there are a few others here that can help in that regard...this is a pretty smarty pants group (in a good way).

Isn't the A/DA TZF? Dunno if the boards are still available.

Nah, leave them connected for now. Mainly I want to see what happens when you take out that resistor.

A nearly 2v drop across a 33R resistor means something is wrong. What is the current rating on your supply (or are you using a battery)? IOW, the current draw on your PCB is either exceeding the available supply or perhaps you have used a 330R resistor...just thoughts...none of these things may be true.

I would start there...remove that resistor and bridge it to get your supply voltage up. That probably does not address the weird voltages on the PT2399, but it is a start.


---wrote the above before reading your last post. Pin8 of your op-amp reads 7.7v off a direct 9v supply. We need to figure out why. If it is connected directly to the supply then again, I think maybe the current output there is not enough.

First I would look at why your supply voltage is so low. 7.15v from a 9v supply means something is amiss. Secondly, without any reference to your layout available, I would look for possible solder bridges between the pins on the SMD chips, or elsewhere. That 5v is coming from somewhere.

Lastly, I'm wondering why you needed to connect pins 3 and 4. They are already connected via a 10-20R resistor internally. I don't know if that is relevant to the problem or not, but it is worth pointing out.

Free w/o cert. I'm signed up.

I would also check for continuity on pads near that resistor to make sure there is none where there should not be. It's always (though rarely) a possibility.

Looks interesting! I don't have enough to do so I guess I should sign up.

Even this isn't enough. Pic doesn't show the cart on the left side with six shelves or the two plastic bins under the table full of PCBs.