can you please help me I spent alot of time researching/reading but its imposible
i dont know about electronics calculation, im an audio engineer
im just depending on tina spice, would you please check/edit this

In spice my opamp and eq filter simulation seems Good, but i dont know in real world
whats my side effect
cant access any opamp only 5532 and op27
i choose low value to reduce noise specially in first stage, i love low noise, SNR
i dont care about size and or how much he draw current, since i have power supply -/+9v


Mic 500 ohm
stage1 gain 1000x
stage2 limiter
stage3 lowpass
stage4 Fet mojo and negative clipper

i would really appreciate your help

http://i1006.photobucket.com/albums/af190/preciousmolina666re/JR MIC PREAMP FINISH_zpsgfjlwikm.jpg

 

The 5534 is an excellent opamp for audio, but a gain of 1000 in a single stage is a lot to ask for. At 20 kHz there will be only about 10 dB of negative feedback, so noise, distortion, and output impedance all will increase.
The opamp lowpass filter corner freq is 318 kHz. Why so high? The feedback loop will not be closed at that freq and gain, so the opamp's internal compensation will provide a lowpass effect.
The overall circuit gain will change as you adjust the lowpass filter pot.
What is the purpose of the negative-peak-clipper at the output stage?

ak

 

a gain of 1000 in a single stage is a lot to ask for

if i add another stage it will add another noise, so whats the highest you think he can?

The opamp lowpass filter corner freq is 318 kHz. Why so high?

is that 10p and 50k? i dont know i just want my 20khz flat, maybe ill remove 10p

What is the purpose of the negative-peak-clipper at the output stage?

just for adding a little distortion

 

What on earth are these transistors doing?

 

I think they are relevant to the "fat mojo" circuit.

No. Wait, that's a 'fet mojo' circuit so I dunno.

 

What on earth are these transistors doing?

im just using it as a diode clipper/distortion?, led and silicon have different character distortion (in spice), i dont know transistor

 

What on earth are these transistors doing?
View attachment 91373

Whenever a large community of non-tech or slightly-tech people (especially artists of any kind) deal with tech, myths and legends arise over time. Such is the case with fuzz boxes, electronic circuits that intentionally distort an audio signal with clipping or some other form of non-linear signal transformation. Different clip circuits gain reputations, and descriptions involving color, taste, feel, etc. Fuzz boxes from the 60's and 70's are meticulously maintained today and can command thousand-dollar prices because of their "legendary" sound. Tom Scholz, founder of the band Boston, built a multi-million dollar electronics company based on his fuzz box design.

Because LEDs and standard diodes (1N914, 1N4004, etc.) have noticeably different V/I curves, they produce different harmonic fields, and thus noticeably different audible characteristics when applied as the non-linear elements. I've seen strange transistor configurations such as in this thread's schematic before, but I think stories about their effects fall more in the myth area.

A friend who is a research electrochemist in Canada has developed a new type of carbon-based semiconductor. A fuzz box based on it is getting excellent reviews.

ak

 

I thinkstories about their effects fall more in the myth area

true

im going to change my first stage to transistor spice said transistor is more quiter, is this true?

 

Your first stage is an opamp with a gain of 1000, very low noise and almost zero distortion. There is no transistor that can do that.

ak

 

Wouldn't two stages of op amps with gains of a little over 30 be easier to implement and also allow you to simplify your filtering?

 

Yes and yes. And, since the noise is uncorrelated, lower noise.

ak

 

should i change my first stage to this(picture below), if its add distortion its ok, i care about only is noise, and waht happen if i 1000x gain that ne5532, should i need a buffer after that?


2stage and noise

transistor version

 

should i change my first stage to this(picture below), if its add distortion its ok, i care about only is noise, and waht happen if i 1000x gain that ne5532, should i need a buffer after that?


2stage and noise
View attachment 91428
transistor version
View attachment 91429

Buffer depends on what load you are driving. If it just goes out to a guitar amp, then no. The amp is not drawing much from this pedal. It is like pushing current through a 250k to 2M resistor depending on the amp.

If you are trying to drive a pair of headphones, then yes, this amp cannot drive headphone speakers at any decent volume and without some sag in the output voltage.

NOTE: your statement above is "I have a +/-9 v power supply." If true, why is your latest version of Tina model using +/-18V. You are going to run out of voltage and hard clip with the amount of gain shown if you are using a 9v supply.

 

my input is Mic 500ohm dynamic

oh i forgot to change it to +/-9

 

Whenever a large community of non-tech or slightly-tech people (especially artists of any kind) deal with tech, myths and legends arise over time. Such is the case with fuzz boxes, electronic circuits that intentionally distort an audio signal with clipping or some other form of non-linear signal transformation. Different clip circuits gain reputations, and descriptions involving color, taste, feel, etc. Fuzz boxes from the 60's and 70's are meticulously maintained today and can command thousand-dollar prices because of their "legendary" sound. Tom Scholz, founder of the band Boston, built a multi-million dollar electronics company based on his fuzz box design.

Because LEDs and standard diodes (1N914, 1N4004, etc.) have noticeably different V/I curves, they produce different harmonic fields, and thus noticeably different audible characteristics when applied as the non-linear elements. I've seen strange transistor configurations such as in this thread's schematic before, but I think stories about their effects fall more in the myth area.

A friend who is a research electrochemist in Canada has developed a new type of carbon-based semiconductor. A fuzz box based on it is getting excellent reviews.

ak

Beside Kraftwerk I've pretty much never heard a decent song made by a person which has made synthesizers or sound effects. I've heard samples by people which have build their own synths or sound effects they made to show you what it can do but that is pretty much it(Too. much. logic. can't. express. my. emotions.). But those who did not build the thing and could not give a crap about how it works some of them make plenty of songs and some quite proper too.

You're confusing audiophools and posers with people which just want to make music that they like

 

Sorry I was just getting a bit tired of the audiomangling bashing on this forum. I know distorting anything is alien to our practices but when you're creating a certain sound it becomes necessary.

 

Beside Kraftwerk I've pretty much never heard a decent song made by a person which has made synthesizers or sound effects.

I'm sorry for your loss.

ak

 

so what i s better on my dynamic mic 500ohm low noise, opamp or transistor?