Chaos Distortion Pedal Questions

[merc]

I know I've been pestering you guys over the last few days with all kinds of questions about pedals, but I think I'm pretty close to starting on this one.  My only problem is a small one or two with the layout.  I used Paul Marossy's layout from 2003, so I don't know if the pedal has been updated since then or not.  I downloaded the layout from http://www.geocities.com/diygescorp/ (click on schematics, then go down to Mark Hammer's Chaos) and I used the schematic at http://hammer.ampage.org/files/Chaos.gif .  In the writing below the schematic, Mark says something about using a 1458 dual op amp, while the op amp on the layout is different.  Which one should I use?  The other question with the layout is on that same op amp, there is a dot on a pin of the op amp, with a line that goes across two tracks to another dot.  Is this just a jumper, or what?

Now this might seem stupid, but I don't want to order the wrong parts, and I'm not too good with these parts anyway since this is my first build.  Using the layout as a reference, are these parts right?

Caps
resistor-looking ones (what type are these?)
(3) 0.1 uF
56 pF
(2) .022 uF
220 pF
390 pF

round ones (electrolytic?) :
4.7 uF
1 uF
(2) 10 uF

Resistors
(4)10k
(2) 1M
4.7k
(2) 100k
470k
22k
2.2k

Transistors
(7) 1N914
1N4001

Op Amp
TL072P

Pots
(which ones are linear and which are audio?)
gain- 1M
tone- 100k
vol- 100k

And before I forget, what sized bit is used to drill the holes?

Thanks again for all of your help in the past few days... I would have given up on making a pedal long ago without your support!

EDIT:  I forgot to ask... what type of jack for input and output?  I know on most builds one is stereo and one is mono, but I don't know which one is for input and which one is output.

[dxm1]

You really need to spend a little time reading the DIY FAQ and the Wiki page. 95% of the questions you've asked in this post are answered there... Links to these pages are at the top of this page. As for the line and dots on the layout, yes, that is a jumper.

For the op amp, the LM1458 uses the "standard" dual op amp pinout, so you have many choices. Maybe a 4558 would be a good choice here, if you can't find a 1458. You could also install an 8 pin DIP socket, and then try out several different chips.

[Mark Hammer]

ANY 8-pin dual op-amp is fine.  There is nothing about the circuit that "needs" a particular choice of chip.

[merc]

I'm sorry, from now on I will check the FAQ and Wiki first.  Thus far, I have just went to Google and for the most part come up with very little on my searches.  I will make it a habit from now on to see if the answers are in the FAQ and Wiki first.  Sorry, I guess it was a beginner's mistake.  I'll try to cut back on my (unnecessary) questions from now on  .

[dxm1]

My reply was not intended to discourage you from asking questions - that's how we learn. Rather, to point you to several good sources of information that you may find valuable as you continue building.

[Pushtone]

Caps
resistor-looking ones (what type are these?)
(3) 0.1 uF - FILM CAP
56 pF - CERAMIC CAP
(2) .022 uF - FILM CAP
220 pF - CERAMIC OR SILVER MICA
390 pF - cERAMIC OR SILVER MICA

round ones (electrolytic?) :
4.7 uF
1 uF
(2) 10 uF

YES ELECTROS. THEY SHOULD BE RATED BETWEEN 16V AND 100V. ANY HIGHER AND THEY GET REALLY BIG. 16-50v ARE IDEAL.
MOUSER ALSO HAS "SUB-MINITURE" CATAGORIES FOR FILM AND ELECTROS. THESE ARE GOOD FOR STOMPBOXES

Resistors
(4)10k
(2) 1M
4.7k
(2) 100k
470k
22k
2.2k

ALL RESISTORS SHOULD BE AT LEAST 1/4WATT. 1/2WATT IS OK BUT BIGGER AND MORE $$$.

Transistors
(7) 1N914 - THESE ARE TECHNICALLY DISCONTINUED BUT ARE STILL AROUND. THE REPLACEMENT IS THE 1N4448 I THINK, SAME THING
1N4001 - YOU CAN USE ANY 1N400x HERE. FOR INSTANCE 1N4007 WOULD WORK TOO. THIS IS THE PROTECTION AGAINST USING THE WRONG POLARITY POWER SUPPLY.

Op Amp
TL072P - ALMOST LIKE WATER. THEY ARE EVERYWHERE.

Pots
(which ones are linear and which are audio?) IF IT DOSENT SAY GO WITH LINEAR. YOU MIGHT WANT AN LOG (AUDIO) TO TRY FOR THE VOLUME CONTROL.
gain- 1M
tone- 100k
vol- 100k

And before I forget, what sized bit is used to drill the holes? - IN A WORD, UNIBIT. GET ONE AT THE HARDWARE STORE OR HARBOR-FREIGHT.COM You want the one that goes up to 1/2" inch.

EDIT:  I forgot to ask... what type of jack for input and output?  I know on most builds one is stereo and one is mono, but I don't know which one is for input and which one is output.
YOU ONLY NEED THE STEREO JACK IF YOU PLAN ON USING A BATTERY AND DC JACK. IF SO THE STEREO GOES ON THE INPUT. OTHERWISE, TWO MONO JACKS.


Hope this helps. Reading the wiki and DIY FAQ will help too. So will ordering the giant Mouser catalog and flipping thought it.
You will want to check the data sheets for the caps to check their dimensions. Some can get very large and are useless in a stompbox.
Avoid the 300-600volt ones. Look for the sub-mini's in the mouser catalog. I also like the Xicon "7mm" high caps for the electros.

Good luck.

[Mark Hammer]

My reply was not intended to discourage you from asking questions - that's how we learn. Rather, to point you to several good sources of information that you may find valuable as you continue building.

Dave is correct.  Of course since we often don't know what we don't know, newer members (and sometimes even older ones!) may sometimes think to themselves "Well, they wouldn't/couldn't have THAT in the FAQ, would they?".  The happy fact is that the FAQ here has been added to and added to, and between that and the Wiki, there is a surprisingly large amount of extremely useful information.  People are generous with their knowledge here, and it shows.  I guess maybe Aron needs to plump up the font size for the links to the various reference documents listed at the top of the screen; maybe people misjudge their usefulness because the links look so tiny.

As for the questions, they are always necessary and always valuable, no matter what the level of expertise that prompts them.  This is a place to learn, not a place to show off (though I think everyone loves to see newbies show off what they have learned).  What may be less valuable and less necessary is wasting your time and energy searching around the net in frustration for info which is actually readily available right here, and is packaged in a way that is explicitly directed at folks like yourself.   Use it in the best of health and welcome to our sick little corner of the world!

[merc]

Thanks for the info guys!  But I have yet another question:  what size should I buy for the enclosure?  I mean, I know the size of the actual PCB I will be making, but the battery, the jacks, the pots, and the bypass must take up some space too.  If it helps any, the PCB will be 1.7" by 2.1".  This might actually be my last question before the actual ordering and building begins.

[Mark Hammer]

It is possible to fit it inside a 1590B, but if you are just a beginner then I would caution against that and recommend a 1590BB chassis.  That will give you more space to see where your wires go and also do any testing or debugging required in situ.

When you're starting out, space is your friend.  Besides, the Chaos is a 3-knobber.  If you figure out how to eventually fit is into a smaller box, I'm confident you can find a use for a 1590BB that has had holes for 3 pots and a stompswitch drilled into it.  I've got plenty of boxes I've re-finished, re-legended, and re-used for other circuits.