Nostradoomus
Well-known member
+1 for Then Came the Last Days of May, probably my fav BOC tune
This week on the Breadboard: The Hybrid Fuzz Driver Deluxe
- Thread starter Chuck D. Bones
- Start date
PedalBuilder
Well-known member
Ok, here's the final version. I've triple checked that it matches up with the schematic that Chuck posted, so it should be good to go. The routing is a bit tidier than the earlier mockup that I posted, and I also added a bias pad to make it easier to measure Q3's collector voltage as you're setting the bias. You can download the Gerber file here. If you order it from JLCPCB, make sure that you choose the "Remove Mark" option for the "Mark on PCB" setting. If you've never ordered your own PCBs before and have questions, feel free to ask and we'll help you learn how. I'll put up a link to a Tayda drill template and an Excel format BOM tomorrow or Friday.
Hi Mr. Bones, could you please share the vero layout of this pedal? It's one of my favorites. Mr. Skreddy mentioned on TGP that the circuit was designed to sound like Jimmy Page's Marshall through a Fender with 6L6s, and on my TR it really shines. For me, it's the best MIAB I've ever played, wide range of tones and it cleans very well too.
Thanks for all your work!
Thanks for all your work!
szukalski
Well-known member
Great stuff mate, if you're using KiCad then the interactive bom plugin is awesome.
Also, need some ceramic footprints!
Chuck D. Bones
Circuit Wizard
I don't have a Vero for that circuit. Looks like PedalBuilder designed a PCB and I expect a couple of other guys are doing the same.
You are welcome.
PedalBuilder
Well-known member
Well, this is a bit late, but here's the BOM.
| Value | Name | Value | Name | |
|---|---|---|---|---|
| C250k | BASS | 47n | C1 | |
| C1k | FUZZ | 5n6 | C5 | |
| C5k | GAIN | 5n6 | C11 | |
| A100k | LEVEL | 4n7 | C9 | |
| B100k | MIDRANGE | 4n7 | C10 | |
| B100k | TREB | 10n | C12 | |
| 220p | C2 | |||
| 1M | R1 | 100p | C7 | |
| 1M | R3 | 470p | C8 | |
| 1M | R4 | 220n | C3 | |
| 10k | R2 | 2µ2 | C4 | |
| 10k | R5 | 22µ | C6 | |
| 10k | R12 | 1µ | C13 | |
| 10k | R16 | 100µ | C101 | |
| 22k | R6 | |||
| 100k | R7 | 1N5817 | D101 | |
| 56k | R8 | LED | D102 | |
| 150k | R9 | BC549C | Q1 | |
| 2k2 | R10 | BC549C | Q4 | |
| 24k | R11 | BC549C | Q5 | |
| 33k | R13 | 2N4123 | Q2 | |
| 220k | R14 | MP35 | Q3 | |
| 330k | R15 | |||
| 100R | R101 | |||
| LEDR | R102 | |||
| 10k | TRIM1 |
The Gator
Well-known member
Oh yeah...works just like it should. An excellent blend of overdrive and fuzz sound are easily dialed in to your favorite flavors. I know I said it before but with the way the gain/midboost and the fuzz works together it makes single notes sound huge and this is a great circuit for playing sustained note solos.
Chuck D. Bones
Circuit Wizard
You didn't strictly adhere to the BOM, did you? 
The Gator
Well-known member
No. Lol. I do not have any Germanium NPN transistors. I just used some 2N3903 low gain silicon for Q2 and Q3. Hfe approx. 68 and 82. Sounded good on the breadboard. C4 is tantalum, but on the breadboard I tried a simple nichicon 2.2uf electrolytic and it worked just fine as well.
Chuck D. Bones
Circuit Wizard
Low gain Si is perfectly acceptable, Skreddy uses aluminum electrolytics in the signal path, so that's good enough for me. In my Skreddy HFD, R9 is carbon comp. Not sure why. CC resistors have loose tolerance, especially the ones that have aged for a few decades. That's one way to vex the circuit tracers.
Chuck D. Bones
Circuit Wizard
I can think of three reasons right off the bat.
1. They left the option open in case they might need a resistor there.
2. They build a couple different circuits on the same board. Skreddy does this.
3. They needed some jumpers. Is the Deep Trip board double-sided?
1. They left the option open in case they might need a resistor there.
2. They build a couple different circuits on the same board. Skreddy does this.
3. They needed some jumpers. Is the Deep Trip board double-sided?
The Gator
Well-known member
It is two layers of trace. The pots and components are all on the same side which seemed strange. Come to think of it you're absolutely correct. The hellbender and the page Bender are very similar. Much more so than the BOG is. I noticed after looking at it again, that they use the zero resistors where they needed the path to make continuity. Like a jumper. And then they just omitted ones that we're not needed to complete the path when other components finished the path. Which is all strange because the traces are not the same on the two boards.
Feral Feline
Well-known member
Gator man, how is it on BASS?
Chuck D. Bones
Circuit Wizard
Probably want to retune a few caps to let more bottom-end thru. N.B. there is no clean bleed and since this circuit inverts, you'll need an inverting amp to get stuff more-or-less back in phase. Definitely breadboard it, whatever you do.
temol
Well-known member
Here it is..
BC109C, BC211, MP38A. Voltage readings on a schematic below.
And working pcb.
The only thing I don't like about the sound is a bit fizzy decay of the notes. I don't know (yet) if that's a feature or something to manage that requires hammering here and there.
The rest is pure joy.. very dynamic, with good tonal posibilities and wide gain range. Sound is rich, with many harmonics.
BC109C, BC211, MP38A. Voltage readings on a schematic below.
And working pcb.
The only thing I don't like about the sound is a bit fizzy decay of the notes. I don't know (yet) if that's a feature or something to manage that requires hammering here and there.
The rest is pure joy.. very dynamic, with good tonal posibilities and wide gain range. Sound is rich, with many harmonics.
Chuck D. Bones
Circuit Wizard
Voltages look good. Try tweaking the bias by ear, might cure the fizz. Also check Q2-B & Q2-C. Q2-C should be higher, but with Ge for Q3, sometimes it's not.
temol
Well-known member
B - 0.58V, C - 0.8V
