Build Report: Burning Crunch (improved Krank D M)

[Renegadrian]

GREAT sound sample...Gotta add this one on the "next one" list...

[petemoore]

   I saw a plain 'ol schematic, but can't find it now !!
  ? ??

[dschwartz]

This is yhe schem of my version (changed the transistor bias resistors for a 1M/100K pair)


build it! haha

[petemoore]

  Nice / neat ...thanks D !!
  Got the last sockets from RS it looks like..there's another one another mile away.

[gnognofasciani]

http://www.drtube.com/schematics/marshall/3005.gif

I think he meant to post an example of scaled down Tone control 
Thanks dschwartz for this little beast!
I'm going to build a variation of the krank too, with a fet boost and a different Tone Stack

[Gus]

Not just the tone control.  Thats the marshall 3005 I posted about googling for in another thread

Two opamps and an interesting sounding circuit. convert it to 9VDC and have fun.

  Some of the marshall lead solid state amps sounded good.

[audioguy]

Hmm I might  have to try this layout!

[dschwartz]

http://www.drtube.com/schematics/marshall/3005.gif

I think he meant to post an example of scaled down Tone control 
Thanks dschwartz for this little beast!
I'm going to build a variation of the krank too, with a fet boost and a different Tone Stack

i thought about a fet, but it gave less gain...
try a fet opamp isntead (if you like more gain)

[joelap]

Impressive!

I too had an idea about using a JFET prior to the LM386 for a pedal, but I dont have any time these days.

Daniel, what program is that you are yousing for your schematic?  Its a nice looking interface... I might be interested to check it out.

Joe

[dschwartz]

i use livewire for the schematics..is the most user-friendly schem editor i ever used..but the components libary is kind of basic....it lets you simulate the circuits too..great tool to learn something about electronics!!!!

the draw the PCB´s in fireworks (macromedia)

[joelap]

i use livewire for the schematics..is the most user-friendly schem editor i ever used..but the components libary is kind of basic....it lets you simulate the circuits too..great tool to learn something about electronics!!!!

the draw the PCB´s in fireworks (macromedia)

Nice... I've got access to OrCad 10.5, Cadence 16, Cadsoft Eagle, CircuitMaker (student edition), Mentor Graphics, and probably more between school, home, and work.  But the look of that struck me as impressive / different.

Love the sound clips.  My favorite is the first one you posted. 

How did you try using the JFET in place of the bipolar?  What source resistor?  Something I did when building an octave up effect was take a J201 and tied the source straight to ground.  I found you need a 10k trimpot to get the drain down to 4.5V in that instance, and it gives a ton of gain.  I dont know if you have it breadboarded up or not, but give that a shot and see if that pushes it over the edge.

Another option might be to try a darlington stage.  Maybe take a stage from one of Dragonfly's darlington based circuits?

Lots of options on this build...!

[dschwartz]

hi joe!
well i didn´t try the fet as the booster, i just know that you get lower gains with them..., but the darlington idea is easier to try!

[gnognofasciani]

First I tried a mosfet booster and it was great, next week i'll try the fet version and I'll post my results 

[dschwartz]

please do!!!!!!!
i´m having doubts about the silicon clipping..

[tcio]

Wow! Sounds excellent (nice licks too!)

[12afael]

it sound fantastic congratulations! you must bring it to the next plexijoin 

[spudulike]

You missed out the ground connection on pins 2 & 4.

[DDD]

Excellent +

[dschwartz]

You missed out the ground connection on pins 2 & 4.

yup..but on the pcb is OK

[gnognofasciani]

First I tried a mosfet booster and it was great, next week i'll try the fet version and I'll post my results 

Fet version is nothing remarkable, but the mosfet one is very cool, but not that different from the bjt...