IC Cable resistance??

jakelm
jakelm Posts: 4,081
edited February 2008 in DIY, Mods & Tweaks
Just built my first set of IC cables, using RG59 coaxial. A couple of snags, you can read my last port here:

http://www.polkaudio.com/forums/showthread.php?p=811565#post811565

Question: In checking the resistance of the cables, I noticed they are .1 - .2 ohms. For a 6' cable is this normal? Also, how much resistance should be accepted in cables?


Better cables, lower resistance?? Is that how it works?




Jake
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Comments

  • Sami
    Sami Posts: 4,634
    edited February 2008
    If you have a spectrum analyzer, I would measure power loss across the frequency span. To me, resistance is far more important in speaker cables than in IC's so don't worry about it too much. Inductance and capacitance might be more important figures but I'm not an expert on the issue so I can't comment any further.
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  • ShinAce
    ShinAce Posts: 1,194
    edited February 2008
    The resistance is not important. The amplifier input will show a load on the order of 30k ohms.

    Remember to test the resistance with the multimeter leads shorted. Very often, the meter will never get to 0. You might not even have measurable resistance.

    Point is, you're wasting your breath. Get back to listening.
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  • jakelm
    jakelm Posts: 4,081
    edited February 2008
    30k ohms, minus .2 ohms for cable, I didnt realize itht e resistance was that high to begin with and I can also see how that will not effect audio.

    The new cables are great, not quite as flexible as I would like, but I think I came out ahead by building it myself, at a low price. And it was fun... Took my mind off of alot that is going on. Its real medicine. Very therapeutic.

    Thanks guys.

    Back to listening....
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • zingo
    zingo Posts: 11,258
    edited February 2008
    The capacitance is the important part like previously mentioned. Nice job on the interconnect building and it is very therapeutic. It's great when you build a pair and they end up sounding better anything you currently own, and costs pennies in comparison.
    Jake
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  • jakelm
    jakelm Posts: 4,081
    edited February 2008
    Capacitance, in a RG59 coaxial cable, should be no problem. I have no way to measure.

    Ah well. It be what it be...
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
    · Share on FacebookShare on Twitter
  • ShinAce
    ShinAce Posts: 1,194
    edited February 2008
    You do not need to measure the capacitance, it can be looked up. Capacitance on RG59 is around 22 pF per foot. So you are looking at maybe 150 pF. Still good to go.
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