Is buying a decent digital coaxial interconnect worth it?

Discussion in 'Archived Threads 2001-2004' started by Dave_Whiting, Nov 19, 2002.

  1. Dave_Whiting

    Dave_Whiting Stunt Coordinator

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    Is upgrading from the cheapest, about $10 usa coaxial interconnect, to a cheap decent ($30 usa) one worth it?
     
  2. Bob McElfresh

    Bob McElfresh Producer

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    The coaxial digital cable needs to be made with something called 75 ohm coax. And hopefully, the RCA plugs are somewhere near this.

    All video cables are made with 75 ohm coax.

    As long as the budget cable works, is well made without loose plugs, and you dont get drop-outs in the sound every few minutes, it's not worth changing.
     
  3. Dave_Whiting

    Dave_Whiting Stunt Coordinator

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    I don't know if the current cable is a 75 ohm coaxial. It just says high quality audio cable. Is there any way to tell. What happens if you use a analogue rca cable.

    Thanks
     
  4. Chu Gai

    Chu Gai Lead Actor

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    yes, it's a 75 ohm, probably multistranded as i take it the cable is probably quite flexible, no?
     
  5. Brian Kleinke

    Brian Kleinke Supporting Actor

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    I just head to Best Buy or whatnot find a nice good quality RCA video cable with good ends (AR Research is what I've been getting) cost is $10-$15 and it works great.

    Some guy did a test and found using a metal coat hanger would work quite well (though it lacks shielding)

    the digital signal is fairly robust, and you're already using cableing way way over what high speed computer networks use.

    Analog Video conectors are another story ;-)

    Brian
     
  6. Alf S

    Alf S Cinematographer

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    Alfer
    I concur...stick with a nicely shielded video cable (the kind with yellow RCA connectors) and you'll get all the digital sound that any of those expensive boutique cables would for a fraction of the cost.

    Enjoy!

    Alfer
     
  7. Danny Tse

    Danny Tse Producer

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    Since this thread is on the topic of digital coax cable, I was wondering can I use two of these as analog interconnects??
     
  8. Paul_C

    Paul_C Stunt Coordinator

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    Yup;

    You can use digital IC's for analog but not recommended the other way around. The reason is that analog IC's do not typically use 75 ohm cable.

    Good luck.

    Paul.
     
  9. Danny Tse

    Danny Tse Producer

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    Thanks for the info, Paul!
     
  10. Dave_Whiting

    Dave_Whiting Stunt Coordinator

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    Chu Gai,

    Yip my cable is pretty flexiable. So do you reccon it is a 75 ohm coaxial then.
     
  11. BruceD

    BruceD Screenwriter

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    Dave,

    The key is to buy "AV" or "Video" labeled cable to use for a digital cable.

    "Video" or "AV" cable is 75 ohm cable, many audio interconnect cables are 50 ohm.

    IF the package labeling says "Video" or "AV" cable then you should be fine.
     
  12. Chu Gai

    Chu Gai Lead Actor

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    i reckon its a 75 ohm multistranded cable probably 20 or 22 gauge copper. i reckon [​IMG]
     
  13. Dave_Whiting

    Dave_Whiting Stunt Coordinator

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    But how to be sure? Could I test it with a multi meter?
     
  14. Chu Gai

    Chu Gai Lead Actor

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    no that won't do it, in fact there's no ready method available for the homeowner to determine this. You see, this 75 ohm is what's called the characteristic impedence and it's independent of length. a 3 foot and a 1000 foot roll will both have a characteristic impedence of 75 ohms (since this is what we're talking about here). Perhaps you're thinking of resistance which could be measured by a VOM. Now if this is going to gnaw at you, go out and pick up some AR Pros or whatever floats your boat.
     
  15. Bob McElfresh

    Bob McElfresh Producer

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