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Projects => General Questions => Topic started by: bradberry00 on February 12, 2013, 01:30:23 PM

Title: Cornish P2 workalike possibility???
Post by: bradberry00 on February 12, 2013, 01:30:23 PM
Hello All,

First post. I'm going to try to start off with a bang.

So it is said that the Cornish P2 is basically a Rams Head Big Muff with flat mids and the cornish buffers. So my question is if I add all of the buffer sections from the Darkside (http://www.madbeanpedals.com/projects/Darkside/docs/Darkside_ver.2.pdf) to the Mudbunny built to Rams head specs and put a 10n cap in c10, do you think I would be in the ball park for a P2 workalike?

thanks,
-david
Title: Re: Cornish P2 workalike possibility???
Post by: jonrhee on February 12, 2013, 06:03:21 PM
I have a madbean project doc for the P2 if it's alright to post?
Title: Re: Cornish P2 workalike possibility???
Post by: bradberry00 on February 12, 2013, 06:21:01 PM
If possible this would be awesome
Title: Re: Cornish P2 workalike possibility???
Post by: madbean on February 13, 2013, 04:43:37 AM
I don't even remember doing that, but I do seem to have the files. I'm not positive of the accuracy...I have no recollection on where the values came from.

Here's the schematic for the dirt part.
Title: Re: Cornish P2 workalike possibility???
Post by: bradberry00 on February 13, 2013, 11:31:38 AM
cool!

do you think the buffers really make much difference in sound?
Title: Re: Cornish P2 workalike possibility???
Post by: jimijam on February 13, 2013, 01:52:17 PM
I built bean's p2 project and it is an outstanding fuzz. I like it much more than the g2 clones. super musical fuzz with an interesting tone control. my favorite fuzz at the moment.
Title: Re: Cornish P2 workalike possibility???
Post by: madbean on February 13, 2013, 03:52:02 PM
Quote from: bradberry00 on February 13, 2013, 11:31:38 AM
cool!

do you think the buffers really make much difference in sound?

I'm sure they make some difference. I don't know whether that would a plus or a negative though.
Title: Re: Cornish P2 workalike possibility???
Post by: bradberry00 on February 13, 2013, 03:55:23 PM
hope this is cool, I frankensteined the schematic you posted with the Darkside buffers/power.

think this would give me the cornish buffers?

I am just curious about the mojo these things have, i may make one bufferless and one with buffers to see what is best.

Do you think the additional power filtering (i think that is whats going on with the extra components in the power section) like the darkside is necessary?
Title: Re: Cornish P2 workalike possibility???
Post by: JC103 on December 27, 2016, 12:00:00 AM
Did anyone ever complete this project?
Title: Re: Cornish P2 workalike possibility???
Post by: cajone5 on January 06, 2017, 08:26:35 AM
Also interested in a PCB of this guy... or if someone knows of a vero layout.  I am still on the paint by numbers path and creating a vero from that schematic is far above my ability level.  :o
Title: Re: Cornish P2 workalike possibility???
Post by: jubal81 on January 06, 2017, 08:43:30 AM
Quote from: cajone5 on January 06, 2017, 08:26:35 AM
Also interested in a PCB of this guy... or if someone knows of a vero layout.  I am still on the paint by numbers path and creating a vero from that schematic is far above my ability level.  :o


You could do it with a Mudbunny PCB and use a second Cornish buffer PCB.
Title: Re: Cornish P2 workalike possibility???
Post by: devilsnight on January 07, 2017, 02:10:09 AM
Quote from: cajone5 on January 06, 2017, 08:26:35 AM
or if someone knows of a vero layout
I really like looking at this schematic for some reason :P , A vero layout would be great. I'll try and revisit this tommarow!
Title: Re: Cornish P2 workalike possibility???
Post by: warriorpoet on January 07, 2017, 10:14:44 AM
Quote from: jimijam on February 13, 2013, 01:52:17 PM
I built bean's p2 project and it is an outstanding fuzz. I like it much more than the g2 clones. super musical fuzz with an interesting tone control. my favorite fuzz at the moment.

Not that I disagree that the P2 is great, but have you tried the G2 fixes, yet? It's an AMAZING circuit.
Title: Re: Cornish P2 workalike possibility???
Post by: cajone5 on January 09, 2017, 08:55:58 AM
Have my duplex drive 90% done... just waiting on Tayda for some resistors.  Didn't want to do multi-resistor math on this one since it's already so neat and tidy looking :)  So I'll have a G2 with the mods in that one build thread soon.

In addition, if the nerve strikes, I'll be putting a P2 on a mudbunny board sometime this year.  The schematics pretty much line up exactly so the part swaps should be easy to sort out.
Title: Re: Cornish P2 workalike possibility???
Post by: warriorpoet on January 09, 2017, 08:06:22 PM
Quote from: cajone5 on January 09, 2017, 08:55:58 AM
Have my duplex drive 90% done... just waiting on Tayda for some resistors.  Didn't want to do multi-resistor math on this one since it's already so neat and tidy looking :)  So I'll have a G2 with the mods in that one build thread soon.

In addition, if the nerve strikes, I'll be putting a P2 on a mudbunny board sometime this year.  The schematics pretty much line up exactly so the part swaps should be easy to sort out.
Best of both worlds!
Title: Re: Cornish P2 workalike possibility???
Post by: JC103 on January 12, 2017, 11:31:16 PM
Looks like an odd mash up of values from the Rams Head and the Civil War... time for another Mudbunny.
Title: Re: Cornish P2 workalike possibility???
Post by: tveen323 on June 20, 2018, 08:29:37 AM
Old post, sorry, if not okay, please remove.

I've been lurking the internet for quite some time to find P2 reference schematic! This thread is the best I could find!
Did any of you investigate further?

I found a photo of the backside of the P2 / G2 PCB (attachment). Apparently they share a identical PCB, which makes me wonder how the tone-stack off the P2 looks like, as you guys drew a basic muff tone-stack.
Title: Re: Cornish P2 workalike possibility???
Post by: jimilee on June 20, 2018, 08:53:36 AM
Check out guitarpcb.com He has a G2 and an S2 if you search here, somebody has a single board for both.


Sent from my iPhone using Tapatalk
Title: Re: Cornish P2 workalike possibility???
Post by: JC103 on June 28, 2018, 06:03:45 PM
the gtrpcb version do not sound authentic, not bad distortion, just not authentic copies. The forumite who designed the 2in1 got it really right when he did his! I think he uses a Paul McCartney avatar.
Title: Re: Cornish P2 workalike possibility???
Post by: juansolo on July 04, 2018, 01:15:29 PM
I've not really been grabbed by any of the Cornish clones I've built. They're all a little too focused on doing one thing for my liking. His buffer is a nice one though and we did jam one of those on the front of a Coloursound Overdriver/Powerboost to make it play nice with other things, which actually worked out quite nicely.