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Well, i'm still waiting for some itens...

This is more like a gain control and mix control. In fact i want two distinct gain patches to give overdrive cw and clean boost ccw...

I will get crazy until my breadboard parts arrive

Now i'm really curious about  sho and srpp stage as clear stage. Unfortunately my stash is in transit (finally i'm getting serious on eletronics. Buy various tools and a full range specs of components).
I have to wait
Thank you again.

Jon;
In sho is possible to control the gain by starving the circuit supply with a variable resistor?

Thank you for information Jon;
In fact i only make a schematic quick with some blocks already drawed to illustrate my question, but thank you for analysis of the whole circuit.
I agree with you. SHO will drive crazy all the circuit.

Hi guys;
I messing arround with some ideas and with one of them i have some dificult:
If in a dual gain stages i use dual gang potentiometer to control the gain between then:
When turn cw the gain of first stage goes down and second stage going up;
when turn ccw the gain of first stage goes up and second goes down;
The idea (attached image is just a sketch) is use a first stage clean and second stage hotter:
Attached schematic is correct in use of dual gang pot?

Thank you guys;

Fooling around right now i discovered a series of tdk mlcc are C0G From 100pf to 68nf:
http://product.tdk.com/capacitor/leadmlcc/en/documents/leadmlcc_commercial_midvoltage_en.pdf
Its just for information.

Select a good stash of components is driving me crazy. In Brazil is quite dificult and overpriced mission (except if you satisfied by chinese crap).
I want to select (with minimum rate of 25v):
Resistors 1206 package with 1%.
Resistors 1/4W 1%
Capacitors NP in wide pf range
Capacitors NP in wide nf range (plus 1uf)
capacitors polarized uf range alum (thinking also in tantalum smd in 1, 2.2, 3.3, 4.7, 10, 22, 33, 47 uF)
Series of handy diodes (rectifiers, silicon, germanium, schottky, zener)
Series of handy transistors (npn, pnp, fet)
Series of handy opamps (single, double, quad).
Use in breadboard and single sided layouts with smd components mixed with radial caps.

Thanks again for your great help. This article jumps on my eyes and helps me to ensure my point: I'm try to learn real eletronics and put all mojo bullshit aside.
http://sound.westhost.com/articles/capacitors.htm

Now i really think  about to get some  (full range value pf-uf) tdk mlcc (trought hole) capacitors from mouser in place of various types to simplify the work. Aparently these mlcc have various advantages over film types and i'm thinking maybe  in guitar-audio(or at least stompboxes application) have no major audible diferences. The major disavantage is dieletric absortion of ~.5%.
This is a good pratice in your opinion or have a whole bunch of capacitor types is better for experiments?

I will spent a big time read all these docs huh?

This guide is great RobA! Thank you. You have some material about capacitors and filterings? I'm want to going deep on it too.

Is a inverting amp. Schematic is anexed. Do i always use ground as reference in rail2rail?

Thank you so much Sr.
I'm already download the spec sheets of a bunch of opa:
lf351, ne5534, opa134, opa604, tl051, tl071, tl081, tlc071, tlc081, lm741. Going print and read. I post the comparison between then.

About rail to rail supply this attached schematic will work? Can i refine the negative supply or charge pump do the job?

Hi guys;
I'm try to figure out how determine if a op amp have high or low current delivery and high/low input impedance.
Anyone knows? I can get this info from datasheet?
I'm trying to apply a parallel opamp circuit (something like a howland current pump) in a overdrive circuit idea and want to mix opamp with high current delivery and low input impedance (master)(like an ne5534 or another) with another with low current delivery and high input impedance(to be determinated).

Another question: If an opamp have supply of 18v instead of 9v they have more headroom. An split supply with +9v and -9v gives same headroom or more? And if this split supply are applied for a circuit like zendrive: The negative supply of opamp is not conected to ground (directly) (assuming using a charge pump) in the circuit i apply the negative supply only in the opamp or entire ground section is negative?

Thanks

And you do that! nicely done.

Yes man, i build one. In fact i like, but i like much more the drive part of effect. the intent is put it in 1590A without smd components. The easy way is take out what maybe dont need cause is pretty big circuit for an od...
Thank you for help me to understand how the circuit works. I will put it in breadboard and test when i have some more time to spent....

Thank you so much for the patience brian and midwayfair.
I have another doubts:
What the function of components around r15? is just tone shaping of clean's section out signal?
incasein order to removal the clean section this group have to be removed too, leaving only the input buffer section, the clipping section, tonestack and output...how much this "cut" affect the overall tone of kingslayer?

If i split the dual gang pot i will obtain blend control like sparkle drive? the clean IS a mix control?
I will not skip the tone stack. just not put in the schematic because have no correspondency with my questions. In reality i quite curious about use the bandaxall in the place of active treble...