Frantone - Brooklyn Overdrive [traced]

[Bononoob]

Turns out Fran showed the schematic on two youtube videos ( and )
I'm not sure about some values since the complete schematic is blurry. Theses are marked by a "?" next to my guessed value. Most guessed values aren't absolutly essential to the circuit in my opinion.
Apparently Fran's model is modified with a switch to exlude IC2 (or IC3) of the circuit.
Don't hesitate to suggest corrections to the schematic if you have a better guess or found out from the videos.

[Axldeziak]

I've found a few errors in your schematic.
your C6 22uf is C5 220nf on the vid schematic
your C5 15uf is C4 150nf on the vid schematic
your R15 380ohm is R14 190ohm on the vid schematic
your C4 1uf is C12 100nf on the vid schematic

I really wish the protel schematic on the second video you linked was more clear. Although, someone going through the pcb layers shown may be able to glean more from it.

[Bononoob]

Thanks a lot for the review. Those points are smaaaall! I checked again and R14 is still 390, its obscured by the youtube bar.
I checked from the PCB, the Q1 pinout is the same as 2N3904. Don't think we can extract much more than that.

[Axldeziak]

Your right, it is 390ohm. I looked at the vid again and was able to capture it a split second different this time and it was a bit more clear.

[racejay]

Hi guys,
From the layout on the video, you can clearly see that only C8, C9 and C10 are polarized capacitors. Also C5 is 220nF.
Cheers!

[soulsonic]

Hi guys,
From the layout on the video, you can clearly see that only C8, C9 and C10 are polarized capacitors. Also C5 is 220nF.
Cheers!

If you mean the 3 I highlighted here:

Brooklyn_Overdrive_HiLight.jpg (77.11 KiB) Viewed 2680 times

Then, no, those are not polarized. They're Nichicon Muse bipolar caps. I used them alot, they're nice.


22K input Z, because... Frantone...

[racejay]

Clean 'blue' layout...