simple 2 knob hi gain distortion..collaboration?

[meffcio]

Say what?  
ESET Smart Security with an up-to-date database shows nothing.. Maybe it's smth on mefiafire? 

[alfafalfa]

Could be !  I use Avira premium suite.

[meffcio]

Fatal flaw on the PCB! (-) leg of C9 should be connected to GND, not +9V!

[meffcio]

Well, I perfboarded it with a TDA2822M and BF245A, and something's wrong. At first when I turned the amp on, playing loud power chords wolud make it cause some clicking. So I started adjusting voltage coming to jfet. Max drain-ground voltage I could get was about 3,2V. Going further the amp started to sqeal like hell, so I settled with that value. Now gain goes from low (clean-like) to overdrive, but very far from hi-gain like in the samples provided earlier by Rob. Tone control works in a strange manner. From muddy (like 3/4 of potentiometer's area) to a little trebley than what I think is normal. Also, increasing volume works normally to about half of pot's range. Going further the sound gets only slightly louder but much more distorted, with really unpleasant sounding of palm muting, so I'm assuming the distortion comes from the TDA chip.
I'll provide schematic and the layout later, because I don't have them on this PC.

[meffcio]

Gave up on that idea - I'll just have the big bastard as a stompbox.
Anyway, that leads me to another question. Did anybody try to put a 3 knob tone stack with this effect? Like the one used in Krank DM. Anybody?

[deadastronaut]

^ hi meffico:  nope, never got round to it, but i think it could handle it...

[meffcio]

Well, I'm stupid. I have a breadboard now, I'll just try it, as soon as I get spare jacks. 

[deadastronaut]

haven't you got any crocodile clips?...just clip to guitar leads..

[jogina111]

which is the best working layout of this project?

[deadastronaut]

check my gallery...

[jogina111]

whats the difference between the big bastard and the bastard sister in terms of  sound,?

[deadastronaut]

not a lot in it IIRC,  i think the big bastard is better though, imo.

i built that one.. ...i always meant to stick a tone control on it though, just never got round to it.

[jogina111]

I've read the big bastard is pretty amp like.. To what amp does it sounds like? Also, can I put a pot at the end of the jfet stage as gain control and putting a jumper on pin1 and 8?

[deadastronaut]

try it on bread board first..

socket C1 to taste..

this is what it sounds like , demo test, i was teting for the notorious fizz wih 386's...but the 100uf power filter sorted that..

http://www.youtube.com/watch?v=W_5SZVyUP-Y&list=UUGP0eO8ADt0H9FY5UcHTf8A&index=35

[jogina111]

brutal carnage! This pedal is hellish! btw, does the trimpot serves as another flavor to taste part or a certain value has to be followed?

[petey twofinger]

why did snoop dog build a big bastard ?

because he doesn't care for the fizzle ...

http://tinyurl.com/2vk8z8d

[deadastronaut]

@mark, its to bias the fet...turn till you get it right....you'll know when.  \m/    \m/ 

if you have a lm386n-3 try that in it also....if not no problemo..

do you have it on breadboard...?..if so try a tone on it.

[jogina111]

as I turn the trimmer, I noticed many shades of distortion but which one is the intended one. Im kinda confused..Gotta have to try a marshall tone stack to it when I got the time.  Great circuit BTW. Still playin it right now, its getting me addicted!

[deadastronaut]

cool, glad you like it,  the fets drain should be around 4.5-5.0-5.5 v on the drain of the fet...(officially)

but that is a matter of taste and opinion really...

see whats best when you have your guitar volume at the lowest without gating...thats generally a good way of getting it right.

[rutabaga bob]

NICE VIDEO, ROB!  I will have to give this one a look-see...I know someone who might REALLY like this!  Larry