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  1. #1
    Member adrian nelson's Avatar
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    dose anyone know where i can get a Hz - uF graph?

    dose anyone know where i can get a Hz - uF graph?
    if such a thing exist, the problem is i know the appox crossover frequencys i want but i dont know the correct copastors to use.

    thanks for the help

  2. #2
    Member PatrickBateman's Avatar
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    Get an oscilloscope. You might be able to find a decent used one. They are rather expensive, but almost infinitely useful and often necessary for work on electronics. Any good shop should have one ...
    I have to return some video tapes.

    HeatWare

  3. #3
    Member james.miller's Avatar
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    that isnt exactly the best idea, is it? lol fancy telling him to blow money on a multi-thousand $$$ oscilloscope

    Get yourself some freeware cross-over design software. that'll tell you everything you need to know.

    http://www.linearteam.dk/default.aspx?pageid=winisd

    WinISD. It's free, and apparently it will sort out cross-overs for you aswell.

    EDIT: yes, it does
    Last edited by james.miller; 03-05-04 at 10:57 AM.
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  4. #4
    Member PatrickBateman's Avatar
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    It is exactly the best idea.
    threadcraping is my spceicalty
    I have to return some video tapes.

    HeatWare

  5. #5
    Member james.miller's Avatar
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    no it isnt

    multi thousand $$ scope, or free software that does the work for you.


    Yeah, great idea there mate.
    The HTPC

    E2160 @ 2.7ghz | Thermaltake The Orb cooler | Asus p5w-dh | 4Gb DDR-II pc6400| 1.00Tb of WD AAKS storage | Asus Xonar D2| 360 HD-DVD drive
    Pioneer bd204 bluray sata drive | Corsair HX620w PSU | BFG GeForce 8800GTX | Silverstone SST-LC17b
    | 22" dell e228wfp | 40" 1080p SONY 40w2000

    ONKYO TX-SR805 | bi-amped mission m71i fronts | eltax center & bipolar rears
    2x 12" custom built subwoofers powered by a denon pma-100m | PS3 with linux and a 250gb 3.5" internal drive | Nintendo wii



  6. #6
    Member PatrickBateman's Avatar
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    OK, OK. I don't want to make enemies, although I would like to see England in the springtime.

    I think I intrepreted the meaning of the word "graph" differently than intended: as a detection mechanism, instead of a chart.

    Yeah, the 'scope won't help him in this situation (not a sarcastic "yeah"). Still, they're pert-snazzy to have around. In this case it would only confirm what's printed on the caps: no use at all.

    --excuse my emotions, please
    I have to return some video tapes.

    HeatWare

  7. #7
    Member adrian nelson's Avatar
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    thanks fo the help, although i found a website that has a calcular to work out the stuff i need,
    and yer i prolly *need* an oscilloscope but what i need and what i can/ chose to aford are two different things

  8. #8
    Powder Junkie Moderator

    Voodoo Rufus's Avatar
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    /me breaks out Eng-100 Circuits notebook, rummages through notes.

    omega = 1 / R * C.
    R = impedance of speakers, C = capacitance in F.

    omega = 2 * pi * F ==> F = omega / (2 * pi)

    F is your cutoff frequency.



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