Build Report: Burning Crunch (improved Krank D M)

[dschwartz]

Hi all:
I built my version of the Krank distortus maximus, and turned out pretty good!! 
I scaled down the tonestack to a factor of 15, an boosted the transistor with a 1uF bypass cap for more gain and changed some cap values to my taste (less bass before clipping), i did my own layout to make it fit in a 1590B type box..

the pics:




the sounds....coming soon!!!!

i´m very happy how the guts turned out..pretty clean and neat....

[anti-idiot]

podrias subir algunos clips de audio? me gusta el acabado de tus efectos, es muy profesional (eventualmente harias algun envio a Peru?)

[bighead]

that looks AWESOME! i could never make that tight of a fit in a pedal.

which caps did you change to allow for less bass?

[dschwartz]

i changed the .022 cap after the trans for a .01

nevertheless, i think it has a little effect

[dschwartz]

now..the demos:

http://diynoise.googlepages.com/k1.mp3
http://diynoise.googlepages.com/k2.mp3
http://diynoise.googlepages.com/k3.mp3

three different settings..
i liked it a lot for chords, but lacked a bit of gain for shred lead gain...i have my dual rectal for that

[Victor]

Amazing sound samples. Tight bass, chunky, mean little stompbox you've made, man!

[dschwartz]

yeah!!..i think "burning crunch" is the perfect name for it..you cant get crunchier than that.....

[ItZaLLgOOd]

When you say "scaled down" do you mean that you just divide all the values by 15?  I read in an earlier post that there were some issues with the tonestack.  Does this cure the problem?

[petemoore]

Dog Dschwartz !1
  You've been busy ?
  Just lately the Tube Double Shot, now this, and all the super build pics....sheezzz !!
  You have to tell more about your rig though...pickups and all that [sorry if you already did and I'm askin' again].
  That soundclip...could make a good 'here ya go' to 'what pedal does crunch metal' posts !
  Distortus Maximus w/scaled down TC you say....soundclips very good !

[Baktown]

This thing sounds great!  Is there a stripboard version of it somewhere?

Rick

[Renegadrian]

I LOVE HIGH GAIN
I LOVE FLAMES



I LOVE THIS LIL' FLAMED DEMON!!! 

[dschwartz]

When you say "scaled down" do you mean that you just divide all the values by 15?  I read in an earlier post that there were some issues with the tonestack.  Does this cure the problem?

scaled down means lowering the resistance by a factor of 15 and increasing the caps by the same factor, such of the RC remains constant..

specifically, my tonestack has this parts:
- Slope resistor: 2.2K
- Treble cap: 4.7n
- mid cap: 330n
- low cap: 330n
- treble pot: 25k B (not exacly scaled by 15, but looks good on the tonestack calc)
- Bass pot: 250K A
- Mid pot: 2.2K B

Dog Dschwartz !1
  You've been busy ?
  Just lately the Tube Double Shot, now this, and all the super build pics....sheezzz !!
  You have to tell more about your rig though...pickups and all that [sorry if you already did and I'm askin' again].
  That soundclip...could make a good 'here ya go' to 'what pedal does crunch metal' posts !
  Distortus Maximus w/scaled down TC you say....soundclips very good !

Thanx peter!! i´ve been very busy indeed!! in fact, still working with the double shot footswitch and last finish, the burning crunch was pretty easy compared to the double shot and worked right away..and there´s a chandler tube overdrive and a Fender PA100 "frankestein-modding" waiting on the line!!!..

Today i´ll get some LM386-3, so í´ll post the differences (if exist)..

The rig i used:
- Guitar (Jackson JDR 94 w/paf pro on the neck and a schaller PU on the bridge, treble bleeding circuit..sounds awesome..) to the pedal..the pedal into the clean channel of a bandit 112 (old, blue-black 90´s one), neutral eq....speaker mic'ed (mic: cheapo karaoke mic) from the back of the enclosure.

This thing sounds great!  Is there a stripboard version of it somewhere?

Rick

yes it is somewhere .. i´ts a pcb, not perfboard, but you can make it anyway..pretty easy..
just search "krank"

[Renegadrian]

This thing sounds great!  Is there a stripboard version of it somewhere?

Rick

http://www.aronnelson.com/gallery/v/mnordbye/layouts/Krank+Distortus+Maximus.gif.html?g2_imageViewsIndex=1

[DougH]

Sounds great and looks great too!

[dschwartz]

..

as a gift, for all you forum members that helped me and supported me..and every one who wants to build this thing..

here´s the PCB layout and transfer:



please be respectfull with my IP..i know it´s based on the krank, but has some of my tweaking and mods that makes it sound different.

note the treble control is reversed....and sorry bout the lousy pic..but it will work.

[Gus]

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

[dschwartz]

what´s up with that schem, gus?

[dschwartz]

damn!!!
i tried a lm386-3..

the clipping was so much better and had a better dirty-clean transition (better, but not the best)

i played "sweet child o mine" intro and i was blown away!!! man this thing NAILS slash´s sound on appetite!!!!!!! i should called it "appetite for crunch" or something!!!!!

listen toi this:
http://diynoise.googlepages.com/sweet.mp3

[djwackfriz]

damn!!!
i tried a lm386-3..

the clipping was so much better and had a better dirty-clean transition (better, but not the best)

i played "sweet child o mine" intro and i was blown away!!! man this thing NAILS slash´s sound on appetite!!!!!!! i should called it "appetite for crunch" or something!!!!!

definitely going to try a few LM386 variations on this

Thanks so much for a killer pedal! My guitar player will love this for his birthday!!!

[ConanB]

damn!!!
i tried a lm386-3..

the clipping was so much better and had a better dirty-clean transition (better, but not the best)

i played "sweet child o mine" intro and i was blown away!!! man this thing NAILS slash´s sound on appetite!!!!!!! i should called it "appetite for crunch" or something!!!!!

listen toi this:
http://diynoise.googlepages.com/sweet.mp3

That sounds perfect! I was aiming to try and build this pedal with a more "chunky" sound, but now I'm thinking I might try and get your sounds with some sort of "switch" for fatter bass.