Hi, i know there are tons of tone control circuit out there but my question today would be how to calculate/alter components values for a desired given tone control range
i am attempting to use a similar circuit
Tone Control Circuit Using NE531 Op-Amp - Circuit Ideas I Projects I Schematics I Robotics
how to calculate the frequency control behaviour ?
i may want to build this circuit for test purpose but i have different values potentiometer, i understand this will affect the circuit a lot.
thanks for helping into my education.
i am attempting to use a similar circuit
Tone Control Circuit Using NE531 Op-Amp - Circuit Ideas I Projects I Schematics I Robotics
how to calculate the frequency control behaviour ?
i may want to build this circuit for test purpose but i have different values potentiometer, i understand this will affect the circuit a lot.
thanks for helping into my education.
ok, it was just as an example as i understand its a baxandal type
i know its a complex one and requires a lot of calculation or a simulator such as the tone stack calculator...
Sometimes there are calculation in the datasheet of opamps, like 5532, 4558...
Like here, on page 29:
http://www.ti.com/lit/ds/symlink/lm4562.pdf
Like here, on page 29:
http://www.ti.com/lit/ds/symlink/lm4562.pdf
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Baxandall figured it out withOUT a computer (neither electronic or human, just a gentleman with a sliderule).
http://www.learnabout-electronics.org/Downloads/NegativeFeedbackTone.pdf
I would figure it by drawing the pots at the 0, 1/4, 1/2, 3/4, and full positions, using a reactance chart to know capacitor values at several frequencies. It does not take long to rough it out.
> i have different values potentiometer
Then change ALL impedances in the same proportion. If your pots are lower R, change all resistances to lower values in the same proportion. Change all capacitances to *higher* values in the same proportion.
If you want to shift the frequencies (not usually wise for a Bax) then leave the resistances as figured but shift all the capacitors by some proportion. Double the uFd will move all freqs down an octave.
yes i did. it is quite hard to optimise you still need to go by trial and error
found out with some existing examples on internet with my actual components and came up with a good compromise. i will try it soon and let you know how it goes.
thanks all.
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