Author Topic: simple 2 knob hi gain distortion..collaboration?  (Read 118968 times)

Derringer

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #40 on: August 16, 2010, 09:38:31 AM »
you have a 4.7 nf cap in series with a 2.2 nf cap ... in that configuration they behave like one 1.5 nf cap.

so to reduce parts count, remove those and try a cap right around 1.5 nf

culturejam

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #41 on: August 16, 2010, 09:39:21 AM »
edit: just tried it...gave off a rumble at the decaying note though...

That's odd. Hmmm. Oh well, go with what works!

Another thought I had (not related to the fizz):

Have you thought about cranking up the "preamp" gain (the FETs) and lowering the power amp  gain (386)??

Like maybe put a 2u2 bypass cap on at least the first FET to up the overall gain and also to up the bottom end a bit.

I'll try to breadboard this later today and see what happens.

deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #42 on: August 16, 2010, 09:41:56 AM »
you have a 4.7 nf cap in series with a 2.2 nf cap ... in that configuration they behave like one 1.5 nf cap.

so to reduce parts count, remove those and try a cap right around 1.5 nf

oh..ok...i'll try it ..cheers....sounclip on page 2...of the big daddies bs

so they should be parallel to make the value up then ?...i didnt have a 6,8nf..

edit: have removed the 4.7nf..all is ok still.......
« Last Edit: August 16, 2010, 09:53:47 AM by deadastronaut »
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deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #43 on: August 16, 2010, 09:42:52 AM »
edit: just tried it...gave off a rumble at the decaying note though...

That's odd. Hmmm. Oh well, go with what works!

Another thought I had (not related to the fizz):

Have you thought about cranking up the "preamp" gain (the FETs) and lowering the power amp  gain (386)??

Like maybe put a 2u2 bypass cap on at least the first FET to up the overall gain and also to up the bottom end a bit.

I'll try to breadboard this later today and see what happens.

great yeah i'll try that when i reboard it up...cheers man,.
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Electron Tornado

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #44 on: August 16, 2010, 09:45:22 AM »
Thanks, deadastronaut. My schematic doesn't show it, but I also have power filtering. However, I used a J102 in front. I wonder if I should try a J201 with the trim pot and cap.
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deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #45 on: August 16, 2010, 09:50:25 AM »
Thanks, deadastronaut. My schematic doesn't show it, but I also have power filtering. However, I used a J102 in front. I wonder if I should try a J201 with the trim pot and cap.

go for it man..whats the worst that can happen...!.. :icon_mrgreen:

post ya results though man.........
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Joe Hart

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #46 on: August 16, 2010, 09:53:06 AM »
It sounds great! How does it sound through an actual amp to speaker to microphone?
-Joe Hart

deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #47 on: August 16, 2010, 09:56:06 AM »
It sounds great! How does it sound through an actual amp to speaker to microphone?
-Joe Hart
hi joe. havent tried it yet..but it sounds good through a moody mixer and stereo so far...so it may just need adjusting

for an actual amp.cab situation..

will try my original design first...damn i need another bread board..ha ha ... :icon_mrgreen:
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Quackzed

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #48 on: August 16, 2010, 10:28:11 AM »
sounds good man, and the fizz is gone !   8)
at least i can't hear anything objectionable in the last clips.
much better!
nothing says forever like a solid block of liquid nails!!!

deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #49 on: August 16, 2010, 10:36:42 AM »
sounds good man, and the fizz is gone !   8)
at least i can't hear anything objectionable in the last clips.
much better!

yeah...wahhheyyyy...maybe this should be 'how to tame a 386 thread' ha ha... :icon_mrgreen:

makes me wonder now about the old projects ive binned because of this problem... :icon_rolleyes:
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arma61

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #50 on: August 16, 2010, 10:45:50 AM »


makes me wonder now about the old projects ive binned because of this problem... :icon_rolleyes:

me too!!!



(can you see all those boards with a 386 on them coming out from the bins!!! Zombies're back!!!  :D

Thx for sharing your tests m8
Armando

"it's a matter of objectives. If you don't know where you want to go, any direction is about as good as any other." R.G. Keen

deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #51 on: August 16, 2010, 11:02:06 AM »


makes me wonder now about the old projects ive binned because of this problem... :icon_rolleyes:

me too!!!



(can you see all those boards with a 386 on them coming out from the bins!!! Zombies're back!!!  :D

Thx for sharing your tests m8
Armando



yeah ive still got most of em... :icon_rolleyes:

as for sharing...no problem..that's what its all about!.........combining forces , bouncing ideas around etc......... :icon_mrgreen:

am working on a vero of the  b****d sister now...just to get it out of my head and into reality... :icon_eek:
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caspercody

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #52 on: August 16, 2010, 11:12:13 AM »
You got rid of the fizz with a 386? Can you post the schematic, or is it the second one you posted?

Thanks
Rob

Quackzed

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #53 on: August 16, 2010, 11:29:28 AM »
i like the collaboration idea, it would be cool to have a folder of original 'forum effects'. new, and altered circuits that have been scrutinized and honed by us 'effects guys'. like a sort of brand name... instead of 'pedal x with joes mods' it could be like, pedal x with refinements and enhancements that are forum approved or something... i can see a voting thread on what makes for the ultimate 'smooth overdrive' say... or the forum approved metal stomp etc... when people come looking for a pedal with a scooped sound for metal or a light overdrive, it could be fun to find the 'ultimate' one, just based on clips and voting and a refinement phase... get a circuit that is considered good for x by vote, then a what can we do to make this better quieter etc... then a final version type thing that can go in the folder...
maybee even nominate some interested 'heavies' as inspector 12 and tone nazi 9. might be good to have at least a somewhat 'forum approved' list of effects and their catagories...
even a 'i think my pedal z kicks forum pedal x's butt, and do a shootout. ha.
challenge the reigning 'crunch pedal' and win!
might be a fun motivator for experimentation...
nothing says forever like a solid block of liquid nails!!!

deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #54 on: August 16, 2010, 11:34:34 AM »
You got rid of the fizz with a 386? Can you post the schematic, or is it the second one you posted?

Thanks
Rob



yep...seems so....a simple 100uf on the power to ground seems to have sorted it........

yeah the page 2 'b*****d sister'.....i took out the 4.7 nf though ok.

heres a vero of it....unverified as yet......but i just knocked it up to get it out of my head...ok ..any problems anyone can see with this?..
apart from it being untidy/big etc.... :icon_mrgreen:..


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https://deadastronaut.wixsite.com/effects

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deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #55 on: August 16, 2010, 11:40:20 AM »
i like the collaboration idea, it would be cool to have a folder of original 'forum effects'. new, and altered circuits that have been scrutinized and honed by us 'effects guys'. like a sort of brand name... instead of 'pedal x with joes mods' it could be like, pedal x with refinements and enhancements that are forum approved or something... i can see a voting thread on what makes for the ultimate 'smooth overdrive' say... or the forum approved metal stomp etc... when people come looking for a pedal with a scooped sound for metal or a light overdrive, it could be fun to find the 'ultimate' one, just based on clips and voting and a refinement phase... get a circuit that is considered good for x by vote, then a what can we do to make this better quieter etc... then a final version type thing that can go in the folder...
maybee even nominate some interested 'heavies' as inspector 12 and tone nazi 9. might be good to have at least a somewhat 'forum approved' list of effects and their catagories...
even a 'i think my pedal z kicks forum pedal x's butt, and do a shootout. ha.
challenge the reigning 'crunch pedal' and win!
might be a fun motivator for experimentation...


yeah i like that idea...better to have a solid project to start with...then mods galore will be inevitable...

yeah cool......this 386 has been p***ing me off for ages...lol.... :icon_mrgreen:

probably been messing with it for over a year...dont laugh..but as im no electronics engineer i suppose thats to be expected. :icon_rolleyes:

but hey i do love the idea of getting something my ears like!...and not so much how its really meant to be done...

as i said in the first post on this, i know im bound to breaking the rules of how it should be done..but hey if it works why not!. :icon_twisted: :icon_twisted: :icon_twisted: :icon_mrgreen:

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Derringer

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #56 on: August 16, 2010, 11:48:31 AM »
 ;D

don't think in terms of "breaking rules" so much

any rules to break would be those of nature and you're going to have quite a hard time doing that  ;)

just think more in terms of, as you have already said, "trusting your ears" and traditional approaches be damned


now plz go and record eruption for us
k?
thx

 :icon_mrgreen:

phector2004

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #57 on: August 16, 2010, 11:52:11 AM »
you fixed it!

gonna post any clips through an amp? I know the spaghetti monster I've got on my breadboard gets distortion just by being !@#$%^& LOUD! So loud, it boosts my SS clean channel into distortion  :icon_redface:
How does it work with speakers?

(p.s. compressor idea was just a thought: http://www.fortunecity.com/tinpan/humperdinck/223/comp.gif... that's the simplest one I could find and its WAYYYY too complicated. Your new design sounds great!)

paulyy

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #58 on: August 16, 2010, 12:01:36 PM »
I went ahead and breadboarded it today and sounds really good Then I took another circuit from Bryan Whamplers advanced DIY effect pedals book, metal dist circuit and added the last part of the circuit to your layout and liked what I got. Still tweaking with it.

deadastronaut

Re: simple 2 knob hi gain distortion..collaboration?
« Reply #59 on: August 16, 2010, 12:04:07 PM »
;D

don't think in terms of "breaking rules" so much

any rules to break would be those of nature and you're going to have quite a hard time doing that  ;)

just think more in terms of, as you have already said, "trusting your ears" and traditional approaches be damned


now plz go and record eruption for us
k?
thx

 :icon_mrgreen:

thanks derringer wise words.....i dont know about eruption though!...ha ha.....used to know it....i'll have a think on that!. :icon_mrgreen:
https://www.youtube.com/user/100roberthenry
https://deadastronaut.wixsite.com/effects

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