uhhh yeah, another muff a comin' ( video samples please check it out )

[Wild E]

Do it! Do it now! You won't regret it! Then start playing with it.

[Scruffie]

Anybody verified this PCB??? I've love to make PCB!!! It's the easiest way!!!!!

I haven't as I can't etch... and no one's mentioned verifying or unverifying it but if anyone wants to etch me one it'd be appreciated  

I'll check the layout tommorow... I think I already did though and it looked fine.

OK I want to build it!!!!!!!!!!!

Hmm... i'm not so sure of it now, I might take another go at it in a day or two.

[Scruffie]

Here we go, think it should be alright now 





50.80 x 50.80mm

[jonnyeye]

I breadboarded this thing, and would like to add my name to the pile of people who think it's worth building. 

That said, I did make a couple of tweaks for the version I am eventually going to build for myself...

1) I found that there was plenty of output at Q3, so I hung the volume pot (100k) from its collector, which cuts even more parts out while providing enough volume for the average Joe, although some exceptional Joes might complain...
2) I put a 10k linear pot in series with the base of Q3, where the stock Big Muff would have 7k5-10k and the schematic for this has a short.  I think I saw this originally suggested by JC Maillet - it is definitely worth having twice as many controls, though!  It essentially acts as a smoothness control, going between fat, roaring harmonics (low resistance) and a rounder, creamier sound reminiscent of classic Big Muffs (high resistance).  It adds another degree of versatility (which I guess is the point of adding controls).

[trat rödenback]

this thing is sick joe! love it!!!!

[azrael]

This thing sounds really good. Here's my perf.

[joegagan]

very nice perf work. aron and i both agree, a perf circuit can be built very quickly and work great! thanks for the post and the nice mention. zac is building four of them currently.

[glops]

Is that PCB verified?  This has always been on the list since I first saw the initial clips.  Maybe I'll give it a go this weekend....

[azrael]

very nice perf work. aron and i both agree, a perf circuit can be built very quickly and work great! thanks for the post and the nice mention. zac is building four of them currently.

thanks! i'm no frequencycentral, but i do like working on perf. i've been doing vero and PCB lately, and was a refreshing change of pace. i had forgotten how painless perf can be if you can manage to remember where you are in the circuit, haha.
i think i can get it inside a 1590A if i put the volume knob on the side...hehe.

i had this layout done a while ago, but just now built it, and am kicking myself in the pants for not trying it out earlier, hehe.

did you and zac end up refining and revising the circuit any more?

[joegagan]

actually, we only dabble with it a little. but i liked it so much in its early form i am going to stay with it. zac has some other plans, so pretty soon there will be the zac version i suppose. one of the 4 he is currently building for bill richardson, guitar tech extraordinaire and one of the world's experts on ampeg dan armstrong guitars (  http://www.danarmstrong.org/necks3.html     ) , being housed in a russian EH box with a clipping option switch and highs cut switch to fill the 2 extra holes. as soon as we get it finished i will make new sound clips and document the mods.

on a related note, zac and i are partnering up on a little retail store inside a nice guitar and amp repair shop in our neighborhood however, not bill richardson's shop. brick and mortar, woo HOO!

[joegagan]

3 of the 4 boards. all work by zac. he is getting good.

[Scruffie]

3 of the 4 boards. all work by zac. he is getting good.

That layout looks awfully familiar 

Is it verified then?

And he seems to have stuck a normal diode in the spot for polarity protection, unless it's a schottky.

[deadastronaut]

a bit late: but nice sustain on that ...cool joe..

no tone control then?...

anyone whacked a humbucker through it?...curious!..

[azrael]

humbuckers are what i use, sounds real good.

[Zzagar]

First off, Scruffie, thank you for the layout.  I only intend to etch a few of these boards.  I have double checked the layout and all seems to be spot on, but will have it verified tonight.  I went with just a standard 1N4001 for the polarity protection diode, only because i didnt have a Zener handy.  Scruffie have you built off of the board you posted?

[liquids]

I'm growing tired of doing such complicated circuits...decided I'm 'gonna build me a fuzz this weekend,' and I think this may be the one.

Of course I'll complicate it afterward.   

Mostly wanted to say - I checked this out on LT spice, and out of the first transistor, it usually shows some 'ugly' clipping.  With this configuration the waveform comes out pretty clean...I'll see what my ears tell me off the breadboard, though.   

[Scruffie]

First off, Scruffie, thank you for the layout.  I only intend to etch a few of these boards.  I have double checked the layout and all seems to be spot on, but will have it verified tonight.  I went with just a standard 1N4001 for the polarity protection diode, only because i didnt have a Zener handy.  Scruffie have you built off of the board you posted?

Quite alright, etch as many as you like, glad someone's enjoying it  look like some nice boards  Slightly flattered one's going to a well known tech aswell 

That doesn't look like a 1N4001 to me... must be a different kind of package, didn't know they came like that!

Nooo, I haven't, I don't have the means to etch, but I looked it over before and i'm pretty confident it's okay too.

Let us know how you get on!

[azrael]

Hm, has anyone measured collector voltages on theirs? Mine is around 3.6 for the clipping sections, 2.1-2.5 for the in/out buffers.
Should i bias them up to 4.5V? hm....

[joegagan]

ha, one  of zac's many hobbies. he collects weird and rare diodes in his spare time. i am serious.

[joegagan]

prototype in an EH case. built for a friend, it is the same as the schem on page 1 of this thread, with the following exceptions:

pregain control, 100k pot ( 2k R between  lug 1 and ground ) , replaces 39k input R.

2200 pf highs pass cap across lugs 2 and 3 of pregain pot, switchable. notice on video, switches in and out.

edit. anyone trying to etch off scruffie's, you need to connect Q2 and Q3 to each 15k power R with a jumper.

edit2 woohoo, this is my #200 video at my youtube channel. comin up on quartermillion channel views (!??)