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Why must you keep finding ways to separate me and my money....

Haha, well this will be a very inexpensive build component and PCB-wise at least. Most of the baby boards will be in the $6-8 range. All in, this is probably a $35 build.

There's a bit of DC on the two mix pots which I had noticed until I started doing this demo. Probably just needs another decoupling cap somewhere, but you get the idea.

Seems to be.

Here's the finished build for the Cave Dweller, which is one of the upcoming Baby Board projects. It's a single chip, dark ambient delay. The three controls are Time, Echo and Dwell. It's a little different than other PT2399 delays in that the Echo is actually single repeat mixed with the output. The Dwell is the more heavily filtered portion of the delay and has endless repeats up to self-oscillation. The two knobs work together two create a variety of filtering and if you set it just right, the repeats will go on forever and turn into kind of a pad or drone. It sounds killer for being "medium-fi".

Anyway, this one is finished and will be released in Feb. Since the design for the etched and fabbed boards are pretty much identical, I'll actually be releasing the project documents and artwork before I get the PCBs in---something I haven't done in a long time!

How to remove the pots without breaking anything or even using a desolder braid: Secure the PCB so that it does not move when gently tugging the pots. Melt the solder on the right pin while very gently pulling the pot away. Quickly repeat with the middle then the left pin. If you do this gently the pot will start to pull away from the PCB without damaging it in any way. Just keep melting each pin for one or two seconds and then gently pull. Eventually the pot will come out. Don't force it or you may damage the actual pad. If any solder is left in the pad after removal, use a combination of solder sucker and poking the tip of your iron through it to remove it.

I do this all the time when my actual desolder pump won't fit in a tight space.

My guess on his 3PDTs is that as probably one of the first suppliers to offer them in quantity some ten years ago, he probably paid a much higher price to stock them than other suppliers are paying now. But, that's just speculation. I totally agree $8.50 is way out of line with what competitors offer. I actually got my current supply of 3PDTs through a group buy over at BYOC last year.

The distortion makes me think the problem resides with R11 and R12. This sets the compression level out of the NE570, and the video sounds like it is amplifying it too much. While I've never had this happen using two 68k's at 15v, it might be worth trying a lower value here such as 47k or 33k. It's a pain, but I would try socekting those two to test this out. Keep in mind though that the signal will be quite loud out of the compressor portion anyway---one other thing to try is a larger value for R42, such as 20k.

I don't suggest doing the mods from the v3205....those are not tested with the MN3005, and in reality they should not be necessary.

claytushaywood ,

I'm sorry that you've had a frustrating time with the build. For future reference: all the MBP projects that allow for PCB mounted pots are fitted underneath the PCB. I could have more explicitly stated this in the document, but I relied on the pot numbers on the silkscreen in this case. I will try to remember to state that more clearly in future documents.

I'm a little unclear as to what you are describing in the first paragraph as far as the "board creating traces between two components". Can you clarify that a bit more?

Really sorry to here that. At least you seem to have zeroed in on the problem.

I cannot believe you got all that in there. Simply outstanding!

I don't have much to add, except that SB, while not perfect, has come a long way in both its offerings, efficiency and over all customer service. Steve really listens to feedback and has made a lot of effort over the years to get those orders out fast and complete. It's pretty tough when you are building project to project and having to order parts to complete them. For me, it doesn't matter so much how long it takes to get here because I generally order stuff that I know I will use down the road, but don't necessarily need right away. I really like SB and I like to support it with my money, too. Steve gets a lot of credit in my book for making DIY pedal building so popular.

Anyway, although I do mention SB a lot in the project docs, it's not through any formal affiliation. Rather, it is very convenient and usually well stocked. Steve is familiar with a good number of the BOMs for projects here, so if you have specific questions about parts for one of the MBP projects, he may have an answer. At least, that is something you aren't going to get anywhere else

Try taking the two BBD's out and put the second one in place of 1C4 to see if it passes delay there. That would at least tell you whether or not the actual chip is not wonky.

I'll try and come up with some more suggestions.

It's early and I've got to get the family off for the day but I will take a look at this a little later this morning and try to offer some help.

Very nice work!

Awesome work inside and out!