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:
(http://diynoise.googlepages.com/k1.jpg)
(http://diynoise.googlepages.com/k2.jpg)
(http://diynoise.googlepages.com/k3.jpg)
the sounds....coming soon!!!!
i´m very happy how the guts turned out..pretty clean and neat....
podrias subir algunos clips de audio? me gusta el acabado de tus efectos, es muy profesional (eventualmente harias algun envio a Peru?)
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?
i changed the .022 cap after the trans for a .01
nevertheless, i think it has a little effect
now..the demos:
http://diynoise.googlepages.com/k1.mp3 (http://diynoise.googlepages.com/k1.mp3)
http://diynoise.googlepages.com/k2.mp3 (http://diynoise.googlepages.com/k2.mp3)
http://diynoise.googlepages.com/k3.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 :P
Amazing sound samples. Tight bass, chunky, mean little stompbox you've made, man!
yeah!!..i think "burning crunch" is the perfect name for it..you cant get crunchier than that.....
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?
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 !
This thing sounds great! Is there a stripboard version of it somewhere?
Rick
I LOVE HIGH GAIN
I LOVE FLAMES
I LOVE THIS LIL' FLAMED DEMON!!! :icon_evil: :icon_twisted:
Quote from: ItZaLLgOOd on February 17, 2008, 11:21:43 PM
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
Quote from: petemoore on February 17, 2008, 11:52:33 PM
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.
Quote from: Baktown on February 18, 2008, 12:56:12 AM
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"
Quote from: Baktown on February 18, 2008, 12:56:12 AM
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
Sounds great and looks great too! :icon_wink:
..
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:
(http://diynoise.googlepages.com/pcb2.gif)
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.
http://www.drtube.com/schematics/marshall/3005.gif
what´s up with that schem, gus?
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 (http://diynoise.googlepages.com/sweet.mp3)
Quote from: dschwartz on February 18, 2008, 09:24:44 PM
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!!!
Quote from: dschwartz on February 18, 2008, 09:24:44 PM
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 (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.
GREAT sound sample...Gotta add this one on the "next one" list... ;)
I saw a plain 'ol schematic, but can't find it now !!
? ??
This is yhe schem of my version (changed the transistor bias resistors for a 1M/100K pair)
(http://diynoise.googlepages.com/schem.gif)
build it! haha
Nice / neat ...thanks D !!
Got the last sockets from RS it looks like..there's another one another mile away.
Quote from: Gus on February 18, 2008, 12:48:15 PM
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 :)
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.
Hmm I might have to try this layout!
Quote from: gnognofasciani on February 19, 2008, 04:08:26 PM
Quote from: Gus on February 18, 2008, 12:48:15 PM
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)
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
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)
Quote from: dschwartz on February 21, 2008, 01:19:56 PM
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...!
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!
First I tried a mosfet booster and it was great, next week i'll try the fet version and I'll post my results ;)
please do!!!!!!!
i´m having doubts about the silicon clipping..
Wow! Sounds excellent (nice licks too!)
it sound fantastic congratulations! you must bring it to the next plexijoin ;D
You missed out the ground connection on pins 2 & 4.
Excellent +
Quote from: spudulike on February 23, 2008, 05:08:41 AM
You missed out the ground connection on pins 2 & 4.
yup..but on the pcb is OK
Quote from: gnognofasciani on February 22, 2008, 08:07:42 AM
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...
Try a blackfire input stage... sounds rabid :D
May I also suggest a bit of a treble or high mid boost at this stage...
yes, i tried it boosted with a microamp, and sound incredible, very much like paul gilbert, extremely sensitive and clear...
Can somebody explain which are electrolytic capacitors(maybe this:220uF,1uF,10uF,47uF)?
This pedal is great,great sound, BRAVO DSM!!!
Thanks.
I got a little confused on that myself but I kind of used the original circuit to guide me. If you look at the PCB layout you'll notce the blue round caps. Those are electrolytic. I don't have or did I see a 220uF in the burning crunch schematics so I am still a little dumbfounded on that BUT.......
I just slapped this thing together on a bread board according to the schematics and Man-O-Man! IMO, other than the ones I custom built totally around all of my personal gear and amplification, this is the best heavy sounding circuit/concoction I have heard yet for a single standalone circuit (not one pedal driving another).
I am absolutely impressed. Other than changing the tone stack to my personal preferences, I doubt that I will alter anything else. Great work dschwartz!
To dschwartz
How to scale down?
What is scaled down by factor 15?
You can show to calculate ?
Tutorial Please..
Quote from: dschwartz on February 18, 2008, 07:37:16 AM
Quote from: ItZaLLgOOd on February 17, 2008, 11:21:43 PM
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
This was posted earlier in the thread, dont know if it will help.
hi all..
i´m back now.. so..
let´s see..
first of all, please dpn´t think i´m the creator of the circuit..it still is a krank, i just made some mods and a pcb...
..
a scaled down thingy:
a frequency filter is defined by the multiplication of capacitance and resistance..that´s an RC filter..so, when you have X resistance and Y capacitance, the frequency corner is f= 1/2*PI*X*Y..
to scale down is to divide the resistance for a factor and multiply the capacitance for the same factor so the product of X*Y remains the same..BUT since there is less resistance, there is less impedance..
for example, i want to scale down to a factor of 10 a filter made of a 100K resistance and 10nF capacitance..
scaled down, the R is 10K and the capacitance is 100nF...the product of res and cap is the same...
Quote from: dschwartz on March 16, 2008, 03:47:22 PM
please dpn´t think i´m the creator of the circuit..it still is a krank, i just made some mods and a pcb...
I knew that (he he) ....... BUT.......Although I found the original circuit to be one of the best sounding I have built (still somewhat of a beginner here), when I modded the Krank to your specs and played through it, I ended up playing for hours. I then brought the R6 47K down to 33K for more gain and played around with the tone stack a little. Ended up playing for about 4 hours straight and couldn't put the thing down until my fingers hurt so bad I had to LOL!
Yes, if you do the math I basically spent the whole day playing other than stuffing some food down here and there. Had a lot more noise due to the gain so I had to place a cap on the input to ground. Still learning this tone stack stuff so I have a little more reading and tweaking to do.
wow! that´s nice!!...
look at this video...http://es.youtube.com/watch?v=CO5aQuSdqZA (http://es.youtube.com/watch?v=CO5aQuSdqZA)
Alright!!!!! That is too cool!!!!!!!!! The "Burning Crunch" on You Tube! Good show. I haven't cased mine up yet but I know I am going to have to use a bigger enclosure to get the knobs further away from the stomp switch with my size 12-13 shoes LOL!
Hi DSchwartz!
Your mods make this a very nice sounding pedal !
Before i mod my diy kdm to your specs i wonder if an "A" poti is NOT a log but a Liner pot in Chile as in the EU where i am from, otherwise a Reverse Linear pot doesent make any sense to me. The second question i have in mind is, about your asmples and the setting for recording. Was drive about 12 o clock till 14 o clock or was it already dimed to 16.30??
After all thx for sharing your mods and the schematic,
Greetings,
Snyder80
the heavy one is with gain at full..the bluesy ones with the gain at 12 or 13 o'clock, and using the guitar volume as a gain control (i tend to do that a lot)
i just builded one and no sound!!!
i test it after the 2n5088 and sounds ok ???
on the pins of LM386 almost all tensions are 7.5-9V...isn't ok?
can anyone post some voltages here?
i used LM386N-1...i didn't found another type...this could be a problem?
did u use my layout?
maybe you missed one of the wire jumpers...
no...i didn't use your layout...i made myself one very tight:
(http://www.aronnelson.com/gallery/main.php?g2_itemId=20931)
my voltages, using a 9.30V fresh battery, are:
Q (BC549C instead of 2N5088):
C=3.50V
B=0.70V
E=0.13V
IC (LM386N-1):
Pin 1 = 8.25V
Pin 2 = 7.53V
Pin 3 = 7.60V
Pin 4 = 7.53V
Pin 5 = 8.50V
Pin 6 = 9.30V
Pin 7 = 8.20V
Pin 8 = 8.25V
i think that i have big problems...:D...thx a lot anyway!
did you use my schematic? remember that there´s a missing trace going to ground from the opamp..
those 7 volts on the IC looks wierd, 386 opamps have an internal voltage divider that bias the ic to 1/2 the Vcc..maybe youre shorting some Vcc to the IC through a resistor..
i used your schematic...it's good or something is missing in it?
i hope i can post my layout now:
(http://www.aronnelson.com/gallery/main.php/v/diyuser/burning+crunch.gif.html)
i saw right now, on another site, that pins 2+4 must to go to the ground :D
and it worked?
yes...it's working now...and sounds very good...but i think i must change the tonestack a little...i like more a scooped sound!!!
I don't have any 330n caps laying around right now, can I use something else?
If so, what?
Would .47 be too far off?
Quote from: jimosity on April 19, 2008, 10:56:04 AM
I don't have any 330n caps laying around right now, can I use something else?
If so, what?
Would .47 be too far off?
you can use the tonestack calculator from AMZ and configure the tonestack to 470n caps
Hey! I'm planning to start with this stomp, but i dont have the exact pots. can i use 22k instead of 25k?
btw, whats the difference beween your version and the http://www.aronnelson.com/gallery/v/mnordbye/layouts/Krank+Distortus+Maximus.gif.html?g2_imageViewsIndex=1
im planning to build the other version and with pots 22k 45k 1M and 250k, do i have to change anything?
Quote from: dschwartz on March 07, 2008, 09:38:03 AM
yes, i tried it boosted with a microamp, and sound incredible, very much like paul gilbert, extremely sensitive and clear...
Did you use the micro amp in front of the Burning Crunch as is, or did you use the microamp instead of the treble boost portion of the pedal before the 386?
Thanks!
Quote from: served on May 29, 2008, 01:13:53 PM
Hey! I'm planning to start with this stomp, but i dont have the exact pots. can i use 22k instead of 25k?
btw, whats the difference beween your version and the http://www.aronnelson.com/gallery/v/mnordbye/layouts/Krank+Distortus+Maximus.gif.html?g2_imageViewsIndex=1
im planning to build the other version and with pots 22k 45k 1M and 250k, do i have to change anything?
if you read the thread, your answer will be there...
Quote from: audioguy on July 21, 2008, 11:04:44 AM
Quote from: dschwartz on March 07, 2008, 09:38:03 AM
yes, i tried it boosted with a microamp, and sound incredible, very much like paul gilbert, extremely sensitive and clear...
Did you use the micro amp in front of the Burning Crunch as is, or did you use the microamp instead of the treble boost portion of the pedal before the 386?
Thanks!
i used it before the pedal..
I might try that, thanks!
Hope my breadboard will arrive soon and I manage to get the missing parts, this sounds really sweet! :) Do you have a 1to1 schem for the PCBs on side 1 you might like to share? I think it would make working this out on breadboard easier...otherwise I ll manage it from the PCBs I guess ;)
you really have an awesome build there.
btw, can we have a the actual size of pcb transfer?
or maybe the resize factor of the pcb you posted?
thanks!
hi, im sorry, but, do you think it is possible that you make me a pcb of this but for use with an DPDT? thanks you a lot... here i cant get the 3dpt...
Quote from: emarix on November 25, 2009, 02:22:57 AM
hi, im sorry, but, do you think it is possible that you make me a pcb of this but for use with an DPDT? thanks you a lot... here i cant get the 3dpt...
Umm, the offboard wiring is independent of the PCB - you can use the PCB on page 1 with either a DPDT or 3PDT without modification.
Rob
Quote from: ralley on November 25, 2009, 05:10:43 AM
Quote from: emarix on November 25, 2009, 02:22:57 AM
hi, im sorry, but, do you think it is possible that you make me a pcb of this but for use with an DPDT? thanks you a lot... here i cant get the 3dpt...
Umm, the offboard wiring is independent of the PCB - you can use the PCB on page 1 with either a DPDT or 3PDT without modification.
Rob
thanks, but... how? is there a diagram or something?
What happened to the schematic for this ?
Can someone post one ? as I have a hard time reading layouts.
Or a list of the changes other than the scaled tonestack.
And whats up with the DUI schematic ?
Is that the booster that goes in front of the Krank DM ?
Sorry for the dumb questions I read this thread 3 times and am just not getting it...
DS that sweet child clip nailed Slashes tone !!!! You always hear "I got his tone down " and then you listen and are like HMMM
But really that sounded amazing.
OH!! i´m sorry guys! looks like i overwrote the schem with the DUI one..
i don´t have the schem on this computer..i´ll try to remember to upload it again..
anyway, the PCB is verified, you can trace down the schematic from there..or just build it as is..
So, I built it, and Yeah great project!
But I think you should pdf this one. Its a real compfort to get the full project as a pdf for exaple Dr Boogey. You dont have to archive multiple files. Builders dont have to search multiple pages to get the taste of it. And a PCB image as a ready to transfer would be super cool!
I will penefit to it and add part list.
Resistors:
100
56K
270
10K
47K
470K
3.3M
2.2K
2.2K
Caps
22n
4.7n
100n
10n
4.7n
4.7n
330n
330n
Caps El.lyt
47u
10u
1u
220u
IC
LM386 - or find what ever works for you best.
Pot
100K A
100K A
25K B
2.2K B
250K A
what do you mean with:
IC
LM386 - or find what ever works for you best.
wich can other can i use?
plz answer
gb
FWIK, LM386-1,2,3,4..i dunno about other chips that will work there..
Guys! Is this box capable of some really heavy tones?
And will this buffer suit the output of the thing?
http://www.muzique.com/news/wah-pedal-buffer/ (http://www.muzique.com/news/wah-pedal-buffer/)
And one other question.. I want to put RedRanger in one box with BC. Should I put it before or after BC?
Can anyone answer, please?
Depends what you mean by heavy... to me, it sounds like a cranked crunchy Marshall. Go to dschwartz website and check out his clips, they are pretty good.
Oh My God !! Sick Sound !! This like Slash's Sound Really !! ;D
Well. I'll give you my picture also.
But I must say, its not the burning crunch and not the Krank DM but it bases on it.
(http://static2.nagi.ee/i/p/551/53/13788425315071_l.jpg/1)
Quote from: served on February 15, 2010, 07:12:34 AM
Well. I'll give you my picture also.
But I must say, its not the burning crunch and not the Krank DM but it bases on it.
(http://static2.nagi.ee/i/p/551/53/13788425315071_l.jpg/1)
nice build!
did you put a booster or something for more gain?
I use a separate Booster pedal for boost. And lately I have been using this pedal for boosting my Amp. It sounds good with some Marshall amps. Really crunchy.
Its a little weak for standalone distortion, but its awesome if you combine it. Nothing beats my Boogey so far, but its a good pedal if im tired of the Boogey and need something different.
yes, that why i asked if ypou put a booster inside..more gain would be nice for shred style soloing.
By the way. Thank you for the thread, I wouldn't have built it if you wouldn't have this thread.
Hi guys this is my take on the Burning Crunch...Enjoy!
(http://www.filefreak.com/files/126032_xsi9k/BurningPlexis.jpg)
This is 3 knob version with some obvious mods like the led clipping and boost switch. The tone stack are replaced with simple Tone stack because im too lazy to wired 3 pots and usually i just leave it at full treble ;D
And here is the sample sounds, i recorded it direct in to my computer sound card.
This is the effect in "Burnin" mode switch off, Crunchy mode off, full volume and gain at 50% then Burnin Switch on at the end of this clip.
BurninPlexis-Clean-CrunchyMode (http://www.filefreak.com/files/126038_qjpmj/BurninPlexis-Clean-Crunch.mp3)
[This is the effect in "Burnin" mode switch on, Crunchy mode on, full volume and gain at 50% then boosted by MI Audio Crunch Box clone with volume at 50% and 0%drive.
BurninPlexis-CrunchBoxBoost (http://www.filefreak.com/files/126039_jrmgv/BurninPlexis-CrunchBoxBoost.mp3)
I really like this pedal, it has marshall-ish amp like sound and crunch! Simple build and easy to modified. ;)
:icon_cool: :icon_lol:
Cheers!
sounds good! congratz!!
did you use lm386-1?, i recommend 386-3 or 4, definetly improves the clipping.
Quote from: dschwartz on February 16, 2010, 08:19:47 PM
sounds good! congratz!!
did you use lm386-1?, i recommend 386-3 or 4, definetly improves the clipping.
Hi thank you Daniel, you're the one who start this crunchy madness im just messin with it ;D
Yes im using LM386N-1 because thats the one i got, maybe i'll try using JRC386.
One thing confuse me though, as you can see there is no coupling caps at the emitter. When im using any caps from 100p to 1uf at the emitter the sound are more defined but there's hum too? Can you tell me whats going on?
Cheers! ;)
Hello everyone!
I'm building a KDM for my friend and I have a couple of questions/problems.
1. 2n5088 aren't really avilable here in Poland. Which other transistor should I use for the same/more amount of gain?
2. I'm planning on building KDM with dschwartz's BC tonestack values and the transistor cap he used for more gain. Will this give me a metal pedal, good for palm muting etc? If no, will putting a booster before the KDM circuit help? I thought of using RedRanger for controlable boost range, but maybe you know better options?
Quote from: dukie on February 16, 2010, 11:40:48 PM
Quote from: dschwartz on February 16, 2010, 08:19:47 PM
sounds good! congratz!!
did you use lm386-1?, i recommend 386-3 or 4, definetly improves the clipping.
Hi thank you Daniel, you're the one who start this crunchy madness im just messin with it ;D
Yes im using LM386N-1 because thats the one i got, maybe i'll try using JRC386.
One thing confuse me though, as you can see there is no coupling caps at the emitter. When im using any caps from 100p to 1uf at the emitter the sound are more defined but there's hum too? Can you tell me whats going on?
Cheers! ;)
the bypass cap at the emmiter boosts the gain of the transistor..maybe that extra gain increases hum..but it is strange anyway since only high freqs are increased..
Quote from: meffcio on February 20, 2010, 09:30:07 AM
Hello everyone!
I'm building a KDM for my friend and I have a couple of questions/problems.
1. 2n5088 aren't really avilable here in Poland. Which other transistor should I use for the same/more amount of gain?
2. I'm planning on building KDM with dschwartz's BC tonestack values and the transistor cap he used for more gain. Will this give me a metal pedal, good for palm muting etc? If no, will putting a booster before the KDM circuit help? I thought of using RedRanger for controlable boost range, but maybe you know better options?
i dunno about a replacement transistor..search for something with at least 600 HFE...
it can definetly be used for metal, but for shred leads, a little extra boost would help..
I can say that for a juicy palm muting this aint the one. But for softer metal and metal chords, its a good one.
But sitll a Question about that Burning mod. In the vero layout pin 1 and pin 8 is already connected. Am I right? So you disconnect it to get lower gain.
So I built a new one!
(http://static2.nagi.ee/i/p/574/73/143683291f0df0_l.jpg/1)
No sticker yet.
Quote from: served on February 22, 2010, 12:17:52 PM
But sitll a Question about that Burning mod. In the vero layout pin 1 and pin 8 is already connected. Am I right? So you disconnect it to get lower gain.
Yup thats right so you can have option from low gain overdrive sound to full distortion. I'm also put the 10K with 0,01uF from pin 1 to pin 5 to stabilize the LM386, but the change are subtle. Recently I've swap the BC549C with AC127 NPN Ge transistor and with little tweaks it work like a charm so i decided to keep this configuration for now.
And congrats on your build!
Cheers! ;)
hi guys..
tried to save the pcb image on page 1....but when i do it comes out totally black on the pcb no white trace outlines......in my photoshop...wtf?.....
also it is massive on print preview..any ideas?..
this sounds like a cool build....if i can get the pcb etc....cheers rob.!
anyone got the burning crunch pcb image????
it comes out totally black when i save it off a page...?
Yup, I get the same thing. This is a bit of a roundabout fix and there must be a simpler way to do it but hey!, it works.
Right click on the image, select E-Mail Picture, send it to yourself,save the attachment to a folder of your choice. It should be alright now. Don't ask me why.
weird!...but ill give it a go..strange how it comes out black eh???... :icon_rolleyes:
cheers mr fuzz..
Quote from: GREEN FUZ on March 19, 2010, 08:46:05 AM
Yup, I get the same thing. This is a bit of a roundabout fix and there must be a simpler way to do it but hey!, it works.
Right click on the image, select E-Mail Picture, send it to yourself,save the attachment to a folder of your choice. It should be alright now. Don't ask me why.
i tried..i dont get the email choice..just save as etc....im on xp...
PM'd.
Quote from: deadastronaut on March 19, 2010, 08:52:20 AM
Quote from: GREEN FUZ on March 19, 2010, 08:46:05 AM
Yup, I get the same thing. This is a bit of a roundabout fix and there must be a simpler way to do it but hey!, it works.
Right click on the image, select E-Mail Picture, send it to yourself,save the attachment to a folder of your choice. It should be alright now. Don't ask me why.
i tried..i dont get the email choice..just save as etc....im on xp...
Its a GIF image with transparency, open it up in photoshop or any image editor and save it as JPEG.
Cheers! ;)
I couldn't even open the Gif in Photoshop initially. Just got this message: Could not open "C:/ file name, location, blah blah blah" because the file-format module cannot parse the file.
That's why I resorted to the roundabout solution.
In any case, it's sorted now.
What does the transistor in the front do, is it an input buffer? And is it necessary?
My other question is what does thing sound like when the gain is dialed back to like 10 o clock
I live in Europe and there is different marking of potentiometers ( Linear is "A" and Log is "B").
So my question is, can you tell me which potentionmeter is linear en which one is Log?
im in uk.....log A.... linear is b....
never got round to building this crunch....did the maximus...but it had strange sound on volume backed off
on guitar....
Quote from: Seltaeb on May 20, 2010, 09:53:46 AM
I live in Europe and there is different marking of potentiometers ( Linear is "A" and Log is "B").
So my question is, can you tell me which potentionmeter is linear en which one is Log?
Hi
get you DMM (multimeter), set the pot "half way", misure between center lug and one of the outer lug, if on the DMM you read half of the value stated on the pot case than it's a linear one , othewise it's a log one.
I alway use my DMM with pot as I use to buy pots from everywere in the world, so you know.... to be sure to be sure...
Cheers m8
Armando
edit : probably I misred your question, you mean which is linear and which is log on the circuit, as far I know
- treble pot is linear
- Bass pot is log
- Mid pot is linear
p
Quote from: TimWaldvogel on March 19, 2010, 05:46:19 PM
What does the transistor in the front do, is it an input buffer? And is it necessary?
with a little research about transistors, you´ll find out that the input transistor is a booster, like a LPB1..
it this necessary for the pedal to make it make any sound? no
it this necessary for the pedal to make it sound as expected? YES, definetly
Apart from the gain boost, that stage introduces some asymetric clipping when cranked and some bass filtering.. to me, its a very critical part of the sound..
anyway, i think that an opamp stage would make hell of a better work there..
hi dschwartz ....i'm nubie here...
i just wanna ask, what is the main differ the lay out you've already post with this one...
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=20931&g2_serialNumber=1)
i found some differ caps and resistors value on that layout...
thanks for the help before...
Hi
Its obvious that Daniels is different,
His has been made to fit a small Hammond enclosure.
His has board mounted pots.
His has been tweaked to sound way better than the majority of Krank DM clones and other 386 OD boxes out there.
Go through the circuit and calculate all the high and low pass filters.
Then calculate the gain of the input stage.
I think you will find your answers there.
FWIW all of Daniels designs are worth building,he puts alot of work and research into each of them.
Quote from: Brymus on June 10, 2010, 04:05:59 PM
Hi
Its obvious that Daniels is different,
His has been made to fit a small Hammond enclosure.
His has board mounted pots.
His has been tweaked to sound way better than the majority of Krank DM clones and other 386 OD boxes out there.
FWIW all of Daniels designs are worth building,he puts alot of work and research into each of them.
amen brother! +1 on all the above
I've just turn off my newly build Burning Crunch (writing this post still wearing my guitar!) my ears are burning and crunched by it's sound :D
HI!! nice sound! i have something to ask! is there perfboard version on this? im having a hard time looking for stripboard.. :icon_sad: i hate philippines lack of things so we are lacking in experiment and explorations ... damn country hehehhe sorry but this country sucks corrupt pass president
Quote from: askwho69 on July 20, 2010, 05:53:39 AM
HI!! nice sound! i have something to ask! is there perfboard version on this? im having a hard time looking for stripboard.. :icon_sad: i hate philippines lack of things so we are lacking in experiment and explorations ... damn country hehehhe sorry but this country sucks corrupt pass president
i havent a perf layout..but i took the schematic and converted it to vero (strip) board.
.today..(not verified.)
i dont know if this will work as it should as i havent tried it yet..
.if someone can see any flaws in this i'd appreciate
your comments..i think its ok till it gets to the tonestack maybe! i messed up there a biti just like messing with this great little programme..diylc... :icon_mrgreen:
thanks to d schwartz for the schematic...rob.
(http://dl.dropbox.com/u/7464107/burning%20crunch1.gif)
sorry if ive trod on anyones toes with this...pm me and ill remove it if i have ok..... :icon_wink:
thanks a lot bro! but i having a hard time looking for strip board maybe ill etch a pcb! :)
i have just revised the tonestack!...does this look better?.any comments please!..........
(http://dl.dropbox.com/u/7464107/burningcrunchtonestack1.gif)
Quote from: deadastronaut on July 20, 2010, 06:15:42 AM
....if someone can see any flaws in this i'd appreciate your comments....
for the sake of clarity, i would change the note cut c1, cut c4 to cut f3, cut k4
Quote from: stringsthings on July 20, 2010, 03:52:54 PM
Quote from: deadastronaut on July 20, 2010, 06:15:42 AM
....if someone can see any flaws in this i'd appreciate your comments....
for the sake of clarity, i would change the note cut c1, cut c4 to cut f3, cut k4
yeah i meant under...... :icon_mrgreen: what dya think though!......
i have done the revised tonestack version now..i welcome any comments..or flaws you can see!...
(http://dl.dropbox.com/u/7464107/version2bc.gif)
:icon_mrgreen: or :icon_sad:
is this strip format works? ::)
i havent tried it yet....so its not verified ok.
Quote from: nalimen on June 10, 2010, 03:27:17 AM
hi dschwartz ....i'm nubie here...
i just wanna ask, what is the main differ the lay out you've already post with this one...
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=20931&g2_serialNumber=1)
i found some differ caps and resistors value on that layout...
thanks for the help before...
is this lay out here verified? does it works? thnks
9V is going nowhere on the latest vero layout.
Quote from: monkey8911 on October 24, 2010, 07:52:49 AM
9V is going nowhere on the latest vero layout.
i never built it in the end, there was too much fizz on the end of notes, a lot of people had this problem,
i posted that when i experimenting with it ok.....
ps. the 9v pin 6 should be jumpwed to the top rail yes!...i just never bothered after the noise issue.
ask around a few people had that noise issue too....
use shielded cables for signal. I got it working that way!
So: from Input to f-switch and to PCB.
From PCB to Volume Pot to output.
Use short wires. Don't cross output and input wires.
Finally I build this, but it wasn't what it should be (I think). There is a lot of gain but no distrotion. It's like slighty distorted overdrive. Also volume rolls down with gain pot.
I probe the signal path and there is just slighly gain after collector. Voltages are C:2,57V, B:0.79V and E:0.18V
What do you think?
I built this on a dorkbot fabbed PCB, my own layout.
Thoughts on how to reduce noise? Or just another problem of the 386?