[Help] Modify To Overdrive

[doplonyo]

Which stage or part can I modify to make overdrive bass preamp.... Switch activated... Help really needed.... Please....
Link to the copyrighted schematic: http://www.albertkreuzer.com/pics/el/pre/schem/preamp_sch21.gif
Copyrighted material removed by moderation.

 

[Loudthud]

Did you build the whole thing? You could increase R13 to 470K or 1 Meg to increase the gain in the tone control path.

There is one small problem. IC2a needs a resistor to ground on pin 3. 470K would work.

 

[Loudthud]

The preamp was designed by Albert Kreuzer. He has a nice website at: Albert Kreuzer

Link to the copyrighted schematic: http://www.albertkreuzer.com/pics/el/pre/schem/preamp_sch21.gif

 

[doplonyo]

I build that and work fine for me as junior technician :d but i'm just like the others who never satisfied what i get,i have some idea but i can reached because i'm so dumb about modify some schematics,so if i can to be help to solve this i'll be much apreciated and very thanksfull....

 

[doplonyo]

Did you build the whole thing? You could increase R13 to 470K or 1 Meg to increase the gain in the tone control path.

There is one small problem. IC2a needs a resistor to ground on pin 3. 470K would work.

the result is diferent that what I hope,but thanks.
Actually I want overdrive sound can be activated by single switch,but nevermind I dont think about this any more, I just want to clone LMB-3 but I don't find the scematic yet, even I found the schematics maybe I couldn't make it because I can't make the PCB layout, any one to share the pcb layout of LMB -3 clone with me??? Please...