A friend gave me one of these pedals today. First glance: Based on CD4049ube, two 2n3819 Jfet's, one opamp. I´ll retrace it next weekend, I guess it will be easy as most traces are visible.
Sound is good, but not overwhelming...
I've played one yesterday
I like it a lot, but it was very bright.
While playing through bright clean channel I had to turne Tone knob at least down to 9 o'clock.
Untill 3 o'clock at the Gain knob it was becomming more gainy, but still dynamic.
Turning gain more didn't really brought new gain, but mostly compression.
SGD has definitely my interest
Re: Mad Professor Stone Grey Distortion
Posted: 08 Jun 2011, 22:20
by roseblood11
Done!
I´ll have to redraw the schematic before I can post it. Veroboard layout is finished as well, I´ll build it on friday to verify the schematic.
Re: Mad Professor Stone Grey Distortion
Posted: 09 Jun 2011, 01:56
by Lawnchair
Irons hot.
Re: Mad Professor Stone Grey Distortion
Posted: 09 Jun 2011, 11:12
by ShortScaleMike
Fast work! I was going to offer to do a vero layout but it seems you've got it all under control - nice work.
Re: Mad Professor Stone Grey Distortion
Posted: 10 Jun 2011, 00:41
by roseblood11
pictures:
Re: Mad Professor Stone Grey Distortion [traced]
Posted: 10 Jun 2011, 00:42
by roseblood11
schematic and veroboard layout.
UNVERIFIED!
Re: Mad Professor Stone Grey Distortion
Posted: 10 Jun 2011, 16:18
by WhiteKeyHole
I wonder by how much, if at all, the Bearfoot Model H differs.
Re: Mad Professor Stone Grey Distortion
Posted: 10 Jun 2011, 23:13
by roseblood11
Schematic and veroboard layout are VERIFIED!
I used a 1n5817 schottky for D2 (because of the lower voltage drop) and a OPA134 instead of the TL051. There´s only a subtile difference in sound compared to the original pedal, but I definitely prefer the clone.
Re: Mad Professor Stone Grey Distortion
Posted: 11 Jun 2011, 16:20
by muhd85
Hi! just to report that i've build that layout and i would say that it sounds marvelous! just like the video. but i used tl071 instead of tl051.. i like this much better than bjf DRD.. its worth it!
Re: Mad Professor Stone Grey Distortion
Posted: 12 Jun 2011, 02:06
by DimebuGG
PCB...
Re: Mad Professor Stone Grey Distortion
Posted: 12 Jun 2011, 14:04
by roseblood11
This is my pedal... I only had that big mojo carbon comp resistor for the 100R. It looks good, but it doesn´t fit into the enclosure...
Re: Mad Professor Stone Grey Distortion
Posted: 12 Jun 2011, 14:19
by euronymous0001
roseblood11 did you try to sub the fet with other types (e.g. J201, 2N5457 and/or MPF102 )
Re: Mad Professor Stone Grey Distortion
Posted: 12 Jun 2011, 14:26
by roseblood11
They are just uses as clipping diodes. You can sub them with whatever you want.
Re: Mad Professor Stone Grey Distortion
Posted: 12 Jun 2011, 14:39
by chriscustom
euronymous0001 wrote:roseblood11 did you try to sub the fet with other types (e.g. J201, 2N5457 and/or MPF102 )
good result also with the type of BF245A
Re: Mad Professor Stone Grey Distortion
Posted: 12 Jun 2011, 16:35
by chriscustom
DimebuGG wrote:PCB...
R4=470k.
Re: Mad Professor Stone Grey Distortion
Posted: 29 Jun 2011, 13:39
by Kaos
Oh yeah!
You guys are my personal heroes of the day!
I just saw a demo( of the pedal and instantly wanted it. That'll beef up my Fender Supersonic.
