Distortion Plus turret board conversion to 250 preamp

[drgonzo1969]

So I am venturing into turret board builds. I got the parts from amplifiedparts.com for a distortion plus and was going to build it stock but it says in the build docs that with a few value changes it can be made into a 250 preamp. However, I haven't found any other info on their site about those value changes. Here is a link to the project and build docs. Can anyone point me in the right direction for some 250 preamp turret board layouts or help with value changes?

https://www.amplifiedparts.com/pedal-guides/build-project-distortion-plus

 

[Locrian99]

Oh it’s the gain pot and i think the diodes from ge to si let me find it

 

[Locrian99]

There’s a couple other things

 

[owlexifry]

So I am venturing into turret board builds. I got the parts from amplifiedparts.com for a distortion plus and was going to build it stock but it says in the build docs that with a few value changes it can be made into a 250 preamp. However, I haven't found any other info on their site about those value changes. Here is a link to the project and build docs. Can anyone point me in the right direction for some 250 preamp turret board layouts or help with value changes?

https://www.amplifiedparts.com/pedal-guides/build-project-distortion-plus

incidentally i drafted a turretboard layout for a DOD250, but i never built it, i’ll try and remember to upload it when i get home (it’s on my desktop)

edit: attached.
- i followed the beavis audio schematic above
- assymetrical diode clippers where an intentional choice, but obviously it’s easy to do whatever you want.
- i haven’t checked it for errors as thoroughly as i would if i was about to build it. happy to email the diylc file if you wanna tweak it.

 

[Erik S]

What’s a 250 preamp?

This looks like something I might want to try. I’m excited to see you build it.

 

[drgonzo1969]

What’s a 250 preamp?

This looks like something I might want to try. I’m excited to see you build it.

Digitech Overdrive Preamp 250

The Digitech Overdrive Preamp 250 the classic returns with vintage correct parts and modern functionality.

digitech.com

 

[drgonzo1969]

incidentally i drafted a turretboard layout for a DOD250, but i never built it, i’ll try and remember to upload it when i get home (it’s on my desktop)

edit: attached.
- i followed the beavis audio schematic above
- assymetrical diode clippers where an intentional choice, but obviously it’s easy to do whatever you want.
- i haven’t checked it for errors as thoroughly as i would if i was about to build it. happy to email the diylc file if you wanna tweak it.

Hell yeah! Thanks for posting this! I will have get a bigger turret board to build that layout. The one I have is only 6 on each side. I might just build the distortion + straight up and then do a 250. I should have enough parts to do both

 

[derevaun]

Brian Wampler's article on D+ mods is informative about the circuit in general. GPCB's Emexar build doc (found on this page) has a table with values/omissions for both circuits.

https://www.premierguitar.com/gear/mxr-distortion-plus-mods

The GUIDES PAGE - Mandatory Reading for all! - GuitarPCB

The Master List Link above contains all original Build Documents.

guitarpcb.com

 

[Gordo]

The Aion D+ version has a few cool mods that are worth noting. https://aionfx.com/app/files/docs/aphelion_kit_documentation.pdf