simple 2 knob hi gain distortion..collaboration?

[caspercody]

The carvin Legacy uses a Baxandall tonestack, with a added mid control. There is a Jfet version of this amp I think on this site called the Leegazzy by Antonio Pelaez that has this tonestack. It is a great tonestack.

[deadastronaut]

The carvin Legacy uses a Baxandall tonestack, with a added mid control. There is a Jfet version of this amp I think on this site called the Leegazzy by Antonio Pelaez that has this tonestack. It is a great tonestack.

thanks. i'll take a look..

[deadastronaut]

disclaimer:

warning no blues or fuzz players should listen!(you have been warned!)
or if your ears are easily offended....ha ha...


hi guys...its grunge day today. because i said so..

heres a sneak preview of a droptuned C#  f****n mean sound...( THE MALEVOLENT DISTORTION)

Definition of MALEVOLENT...
1
: having, showing, or arising from intense often vicious ill will, spite, or hatred
2
: productive of harm or evil

not me by the way...the pedal..

the recording doesn't do it proper justice..bear in mind this is straight into a mixer..no amp....

so through an amp it should be monstrous....

and yes its still a 386n-1..and still a simple 2 knob project too... still messing around with it ok...

http://dl.dropbox.com/u/7464107/grungeo1.mp3

[jcgss77]

disclaimer:

warning no blues or fuzz players should listen!(you have been warned!)
or if your ears are easily offended....ha ha...


hi guys...its grunge day today. because i said so.. icon_mrgreen

That, my friend, is one MEAN pedal you have made yourself.  That is the sound of the schemo on pg 2?  If so, I am throwing this on the board this weekend with the baxandall. 

[deadastronaut]

disclaimer:

warning no blues or fuzz players should listen!(you have been warned!)
or if your ears are easily offended....ha ha...


hi guys...its grunge day today. because i said so.. icon_mrgreen

That, my friend, is one MEAN pedal you have made yourself.  That is the sound of the schemo on pg 2?  If so, I am throwing this on the board this weekend with the baxandall.  

hi j.

yeah its pretty much the same as the schemo...i just adjusted a few bits for lower tunings..could be made switchable too...

if you do it with baxandall i would love to hear it...also if you have/or create a vero of the baxandall that would be handy too...

so i can make a seperate tonestack to add to various projects and try out!....cheers rob.

[will queue for free stuff]

Here's a link to various tone stacks....
Baxandall, or is it Baxandahl, is about two thirds down the page.
Good notes.
Craig.
http://amps.zugster.net/articles/tone-stacks

[deadastronaut]

cheers craig..nice link ........excellent in fact!!!....

is it me or are the pots wired/numbered backwards?...

shouldnt the 3 lug be the input on these??..

[deadastronaut]

hi guys ,

just looked at the tsc version of 'james'..(baxandall)..doesnt seem to scoop much though!!!!...to look at...havent tried it yet!..

when i look at my 7 band graphic pedal with the scoopy settings i like (for chunky metal, grunge, thrash riffs) they are as follows...:

100/0  200/-5  400/-10  800/-15  1.6k/-10  3.2k/-5  6.4k/0.....roughly..

so i guess my question is...how do i get this sort of graphic tonestack setting but with  (2 or 3 ) knobs at 12 oclock already so i get full tweakability
of a good scoopy sound.. a full on scoopy eq if you like!. without maxing out all the pots to achieve it...
ive messed about with values in the tsc but cant seem to get it!!!...even with the marshall BMT...

armando hinted on this earlier as a set eq...which got me thinking!!!!...

edit: just been doing a vero of the carvin/leegazzy eq(suggested by caspercody)...BMTVP...phew!..that was a brainache!..
@caspercody , where does the pin 1 on the mid pot go..ground?.

[caspercody]

No connection to pin 1 on the Mid control.

[deadastronaut]

cheers man...

done a vero of it...bit messy i know..what dya think?.

[Scruffie]

just looked at the tsc version of 'james'..(baxandall)..doesnt seem to scoop much though!!!!...to look at...havent tried it yet!..

Remember my Scruffiestortion? Look at the Baxandall on that, it can do scooped mids with both knobs up and flat with both down.

[deadastronaut]

just looked at the tsc version of 'james'..(baxandall)..doesnt seem to scoop much though!!!!...to look at...havent tried it yet!..

Remember my Scruffiestortion? Look at the Baxandall on that, it can do scooped mids with both knobs up and flat with both down.

yep i remember it...i still have the schematic...i'll take a look man...cheers.

i did a vero of the baxandall too...different values to your though!..

what dya think?..

[caspercody]

That looks good! I used one cap for the C5, C^, and C7 combo. I think it was 11nf. I didn't do the presence part of this tonestack, so curious to hear your version??

[deadastronaut]

That looks good! I used one cap for the C5, C^, and C7 combo. I think it was 11nf. I didn't do the presence part of this tonestack, so curious to hear your version??

yeah i thought the c5-7 bit was weird!...

im curious to see how it sounds too...

has anyone built the leegazzy...?..is it very hi gain ?....just curious to hear it!..

[phector2004]

Threw this on the breadboard the other day and started messing with parts. Here's what I've got:



I popped in a 2N5089 before the IC, and tried it without the FET. It sounded very "constricted" and not metal enough so I opted for a lower gain 2N2222 and put the fet back in. Swapped J201 with 2SK117 after, giving it a bit less gain and softer highs, also lowering the voltage a bit to taste. Tried recording again, but I think I need to invest in a new soundcard or a box of some sort.

My plan is to add a tone control between the FET and the BJT, maybe the baxandall, but I need my shipment of pots first. Until then, I have to learn about filters. Also picks up a Crapton of radio/computer noises...

Overall a very fun project to work on, though. I'm learning loads more adding stuff to this than by trying to dissect more complex circuits. Thanks!

P.S. is it ok to post modified schematics, or should I be writing/doing something before posting?

[deadastronaut]

Threw this on the breadboard the other day and started messing with parts. Here's what I've got:
I popped in a 2N5089 before the IC, and tried it without the FET. It sounded very "constricted" and not metal enough so I opted for a lower gain 2N2222 and put the fet back in. Swapped J201 with 2SK117 after, giving it a bit less gain and softer highs, also lowering the voltage a bit to taste. Tried recording again, but I think I need to invest in a new soundcard or a box of some sort.

My plan is to add a tone control between the FET and the BJT, maybe the baxandall, but I need my shipment of pots first. Until then, I have to learn about filters. Also picks up a Crapton of radio/computer noises...

Overall a very fun project to work on, though. I'm learning loads more adding stuff to this than by trying to dissect more complex circuits. Thanks!

P.S. is it ok to post modified schematics, or should I be writing/doing something before posting?

hi phil. great to see your experimenting example...fet and a bjt .interesting...
why a tonestack before the 386?..curious!...it has plenty of output to drive a stack at the end!..
ive seen some where the gain is controlled straight after the fet too rather than at the 386..just as a note..

im fairly sure that when this has a sheilded input, and boxed ,most or any noise should go...(i had a neighbours mobile phone p***ing me off yesterday )

as for the baxandall havent done it yet!..i have got loads of tonestacks to try..i'll board em try em, and if i like em i'll
put em in little boxes, to add as a module to projects..seems the way to go!..there are so many out there!..

yep im learning much more, now its in front of my face, im not a great studier of books ,i get distracted easily,mainly by postmen and my cat.
and friends turning up with beer etc..but i figure if i start at the bottom and get a greater understanding of a simple distortion (ic or fet)then it will
stand me/us all in good stead for future projects too...
just a note:
i built a capacitor sub box,and  now i have built a resistor sub box too..(with most common values).what a tool ha ha...
they are brilliant, instantly sub a part without having to go through my trays of bits and trying them..i highly recommend
building those ...saves so much time and its effortless.and instantly 'hear' the difference a cap/resistor makes....coz im lazy too..  

here they are:


im enjoying this project immensly too..my girlfriend on the other hand maybe not so much

so post away!!!!!..no problem dude!...

heres a better pic of the sub boxes..

[phector2004]

love the sub boxes! gonna buy a few 1590As next time I order. More getting up to find stuff = more time taken to drink my beer = warmer beer 

I'm thinking of putting the tone stack before the 386 for a more traditional "amp" design, with the chip acting as a sort of power amp and the transistors as a preamp. Then again, it has way too much power to begin with so I'll try it out after the chip as well, see which one sounds better.

[deadastronaut]

love the sub boxes! gonna buy a few 1590As next time I order. More getting up to find stuff = more time taken to drink my beer = warmer beer  

I'm thinking of putting the tone stack before the 386 for a more traditional "amp" design, with the chip acting as a sort of power amp and the transistors as a preamp. Then again, it has way too much power to begin with so I'll try it out after the chip as well, see which one sounds better.

yeah warm beer ...urghhhh!..my sub boxes are plastic ones...!!! cheapo.. :icon_mrgreen:but very handy
just been messing with this again.with my amp...as an experiment i took out the 2,2uf...less gain but no radio noise..but less gain ...just a thought!.edit:...i just put a 220nf in there.hi gain again..less noise tho...probably illegal but it works ha ha....
arghhhh i also need to build an electrolytic sub box now !....

i also changed the output section to a 10nf into a 220k...attached a 10k volume..now it has a 12oclock level..

yeah i get the pre/amp idea....cool post ya results...

nb: i bought a usb soundcard for a mate a behringer uca202 usb, cheap as, and good too...check em out..about 25 quid in english

edit:

heres a quick sample of the experimental noise reducing...just for a laugh!..
first sample is wth the 2.2uf..and a 22k resistor going to ground...
second is with a 220nf and a 22k....quieter
and third is with no cap at all....22k...very quiet but gainless...
hear the difference in noise/hiss..?....
http://dl.dropbox.com/u/7464107/hisstest.mp3

[phector2004]

interesting... I read your post before you added those...

Been playing with LPFs today. Threw a 220Ω in series between the FET and the 10n cap, with a 47n after it going to ground. The radio man shuts his pie hole, and it doesn't affect the sound too much (its blocking stuff broadly, starting at about 20kHz and peaking near the 100kHz range) but it's just not the same

I'm thinking of replacing the BJT with a FET again, but the dense green-wire afro growing on my breadboard might just mean another adding it in front 

[deadastronaut]

well at least we know how to make a radio or not  now ha ha........
yeah i think the 2 fets is a good way to go...more experimenting i guess...

am getting sidetracked at the moment with a book ive just been reading about flashing leds and ldr's...tremolo's basically..
dont know why, but i cant resist a flashing led or 2....

also in this book it shows a 386 amp with 200 gain with a 0.1uf on pin 4 to ground, and a 0.5uf on the bypass pin 7...
and a 10r on the output going to ground....reckons to use them if it oscillates or whines by itself....just to throw that in.

but in the datasheet it has a 0.05uf and a 10r on the out going to ground...and an anonymous cap to pin 7..hmmmm......