Missing Build Docs / Schematics
- Thread starter Robert
- Start date
Robert
Reverse Engineer
Oh, I get it, now. It's in a PDF, just not the one I can access.
This file?
Chuck D. Bones
Circuit Wizard
Oh right, another Tube Fuzz Muff Bender, mark 3. 
Feral Feline
Well-known member
No, not that one, the one on the page that hasn't been refreshed on my computer yet.
@PedalPCB Will the building documents for the project https://www.pedalpcb.com/product/pcb453/ be on the site?
I have the board waiting to be populated )) or am I the only one who ordered this board?
I have the board waiting to be populated )) or am I the only one who ordered this board?
Last edited:
jimilee
Well-known member
The values are on the board, they’re tiny, but they’re there.
Yes I know )) but it's always nice to have schematics to check and the drilling template is a big bonus alsoThe values are on the board, they’re tiny, but they’re there.
Chuck D. Bones
Circuit Wizard
The Unchained is an interesting circuit actually. The active notch filter up front makes a variable depth scoop centered at 160Hz, making it more of a bass scoop than a mid scoop. Then comes an asymmetric soft clipper with over 80dB of gain 
. It becomes very mid-focused at the highest gain settings. After that is a treble-cut Tone control followed by a level control and an inverter to undo the inversion of the Tone stage.
With all of those opamps, the Tone stage could have been Baxandall. Or the treble cut could be passive and use two less opamps.
I'm not convinced that the charge pump is necessary. With the right opamps, headroom does not need to be an issue. Looks like the max output is around 6.5Vp-p.
Another breadboard candidate.
. It becomes very mid-focused at the highest gain settings. After that is a treble-cut Tone control followed by a level control and an inverter to undo the inversion of the Tone stage.With all of those opamps, the Tone stage could have been Baxandall. Or the treble cut could be passive and use two less opamps.
I'm not convinced that the charge pump is necessary. With the right opamps, headroom does not need to be an issue. Looks like the max output is around 6.5Vp-p.
Another breadboard candidate.
jimilee
Well-known member
Totally agreeing with you. Schematics are so helpful.
jimilee
Well-known member
Thank you.
jimilee
Well-known member
I just happen to be thinking, the drill template will be the same as all of the other pedal PCB 6 knob pedals. Robert follows the same format with just about all his pedals.
Robert
Reverse Engineer
That's correct, the Plaid is the standard 6-Knob (Type 1) template.
I'm hoping to have the build docs for most of the pending projects (aside from the stacked projects) done soon, I have about three more PCBs to verify then I'll be doing a doc binge. I'm going to order parts to rebuild each of the stacked projects as well soon so I can take photos of the process and assembly.
I'm hoping to have the build docs for most of the pending projects (aside from the stacked projects) done soon, I have about three more PCBs to verify then I'll be doing a doc binge. I'm going to order parts to rebuild each of the stacked projects as well soon so I can take photos of the process and assembly.
Chuck D. Bones
Circuit Wizard
You all should know the risks when you buy and build boards before the build docs are published. I've done it once or twice and gotten away with it, but as Dirty Harry says: "Do ya feel lucky?"
jimilee
Well-known member
For sure. I knew if I had the schematic, I could figure it out.
If given the choice of having the PCBs available ASAP or not having them released until the build documents were available, I think most of us would opt for having the choice of being able to order the boards and then see if we needed to wait for more information before doing the build.
jimilee
Well-known member
With the part values on the pcb, it really isn’t a problem.