ProtoBox DOD 250 "Sustain"

[ttist25]

Hey everybody!   I breadboarded my first circuit on my "ProtoBox".  It sounds pretty good for a first attempt and now I'm working on tweaking it.

One thing I'd like to do is get the distortion to sustain longer.  If I rock a power chord the distortion lasts about a 3-4 seconds then it drops off and only the "clean" signal is left.  Where would I look to try to get the distortion to keep on keepin on? 

It's especially evident when I play single notes and only lasts 2-3 seconds.

[ttist25]

I think I might've helped this out some by replacing C1 (10uf) with a larger value cap (I think I used 33uf). 

Hard to tell if I'm imagining it.  Yay noobness!   



It seems to have reduced some of the random "crackling" of the distortion I was hearing.  How fun is this? 

[deadastronaut]

your still on breadboard right...

try lowering R7 to 100r-1k..

try raising R8 to 1.5M -2M...

I tried the 250, but ended up going with the YJM 308...should have been a reverse log pot, but didn't have one handy..
http://www.youtube.com/watch?v=0ZC2hMqzOM4&list=UUGP0eO8ADt0H9FY5UcHTf8A&feature=c4-overview

i have a vero layout of this yjm308 if you want it...

[ttist25]

Holy CRAP man!!!!  That sounds like Jesus!!!     Nice job!  The etching is beautiful to boot.  Fantastic job. 
 
I'm still playing around.  I'm still really just getting the hang of soldering so I've got a long way to go but anyway.  I've got this thing sounding pretty good from a cap and diode perspective so I'll play with R7 and R8 and see what that does.  Maybe replace one with a variable resistor (as you can see there are plenty to choose from ).  Or could that end up in a disaster? 

Thanks so much for your response!

This is going to have a negative affect my job performance.   

[deadastronaut]

This is going to have a negative affect my job performance.   

indeed, ... have fun, cheers.