simple 2 knob hi gain distortion..collaboration?

[deadastronaut]

cool....

[VITOR_BAN]

interesting project man, congrats. i was thinking of adding it to a amplifier (this one http://www.diystompboxes.com/smfforum/index.php?topic=89893.0 to be specific) any advice on how to add it with just gain control replacing the existent?

[phector2004]

I can't see the details, but I think you'd need to add another power section for 9v

Basically a regulated wall wart (see generalguitargadgets / Small Bear projects) in addition to your high voltage power supply.

Shouldn't be too hard to implement. From that point on, you can feed this distortion circuit's output into the amp's input, maybe adding a DPDT toggle switch to bypass it if you want. On a similar project, I'm looking at using a trimpot to set the resistance between my preamp and poweramp to keep the power amp from clipping, so you can probably replace the volume pot with one of those.

One thing to note: I think people were mentioning the gain control didn't do much... so it might be smart to test it out on your own.

Good luck!

[Der Groovemeister]

I experimented with different types of tonecontrol, but i like the SWTC best! I removed the 1M res, put a 1k res, then a 10K pot with the wiper via a 22n cap to ground. Then lug 1 of the 10K pot to the 1M and then a 50K vol pot.
It sounds great this way.  The only thing i can't temper is the fingersqueek. It seems that these very high frequencies are somewhat emphasized. It squeeks much more than for example my Purple Plexi, which is also a 386 based dist.
Does anybody experience that too? And how can i attenuate that? Maybe raise C1?

[Der Groovemeister]

Rob... Anybody... ideas?

[Quackzed]

id say you could probably dump some high end at the input via a 50-150ish pf to ground rather than after in the tone section. my thinking is that the circuit is probably amping those freqs so much that you might find removing them after steals too much clarity, and makes for a slightly muffled sound... just a theory... you could probably see if turning your guitars tone controll down a bit lessens the string squeak and go from there...

[Der Groovemeister]

Tried several small caps from in to gnd. Doesn't help.
@Rob: I saw an other version of the vero layout you posted in your gallery that has a cap and a res more: R4 and C6.
What do these do?

[deadastronaut]

hi servaas, if i remember correctly, it was to have better control/range of the gain pot...i think i prefered that version... (page 3)

its been a while since doing that project....

[Der Groovemeister]

Ok so it probably did nothing to the sound?

[deadastronaut]

not that i recall...

[vendettav]

so which schematic/layout shall i use?? I can't seem to find the latest one

[deadastronaut]

hi V.

i made this one...my mates very happy with his...through an amp of course...

http://www.aronnelson.com/gallery/main.php/v/chickpea/bastardsister1.gif.html

change c3 to a 4.7nf for a warmer sound..or make them switchable...or socket it to see which cap suits you and your amp/cab best ok...

here it is on breadboard into a clean marshall ok...

http://www.youtube.com/user/100roberthenry?feature=mhum#p/u/10/W_5SZVyUP-Y

its a nice easy build...

[vendettav]

Hey Rob, thanx for the response, that layout does look cool, the only thing I'm missing here is a trim pot but Hey! just remembered I have a 25k pot left there... Might try it out even now if nobody bothers me

ahh ok before i do that i'll got try and breadboard Bass fuzz with a starve knob.. just wonder what's gonna happen... 

[kinski]

Hi all,

I recently built a D*A*M Sonic Titan, and it sounds AMAZING. However, I too am having a decay problem just like what was mentioned earlier in this thread, as it also uses a 386 chip.

I read on this thread that "a simple 100uf on the power to ground" can fix this decay problem. My tech skills are pretty bad, so I was wondering if somebody could explain a little better to me how to wire this 100uf cap "on the power to ground." I'd greatly appreciate it, as I'd love to get this decay issue fixed, cause like I said, it sounds amazing!

Thanks!

[askwho69]

it's easy mate.. just look at the layout on this thread and take a good look on the 100uf on how the thingy is intall.

[caspercody]

Look at page 6, reply number 103 from B trembley. He has a schematic that shows the cap in question (upper left corner). It is basically the positive side of the cap connected the the positive side of the battery, and the negative side of the cap connected to ground.

[kinski]

Hi, thanks for the responses!

Well, I only have a 220uf cap on hand. I tried that, I can can't hear any difference in sound and no change in fizzy decay.

I connected the positive side of the cap to the same lug on the DC jack that the positive battery wire connects to, and the negative side of the cap to the ground lug on the 3pdt switch. Is this correct?

[askwho69]

Just connect the positive + to the positive power on your board and the negative to the ground... thats it

[kinski]

Yeah, I tried this cap with no improvement.

I did however find a solution this morning! This circuit (DAM Sonic Titan) seems to hate batteries. The decay is just awful. However, I finally used some DC power from my Voodoo Lab Pedal Power and it decays PERFECTLY! This is totally fine with me, as I always gig using DC Power, and only use batteries around my apartment when I'm too lazy to fetch the Pedal Power.

Thanks again for the help. It was much appreciated! I'm learning more and more about this stuff every day thanks to this forum.

[GodSaveMetal]

hi V.

i made this one...my mates very happy with his...through an amp of course...

http://www.aronnelson.com/gallery/main.php/v/chickpea/bastardsister1.gif.html

change c3 to a 4.7nf for a warmer sound..or make them switchable...or socket it to see which cap suits you and your amp/cab best ok...

here it is on breadboard into a clean marshall ok...

http://www.youtube.com/user/100roberthenry?feature=mhum#p/u/10/W_5SZVyUP-Y

its a nice easy build...

Hey there, Mr. deadastronaut here's my contribution for this pedal in SPRINT LAYOUT program; based in your 1 FET prototype for your consideration man; it is no verified; you see any error on this? thanks for the inspiration!!!