Results 1 to 5 of 5

Thread: Shielded cables, again.

  1. #1
    Join Date
    Dec 2006
    Location
    Pflugerville, TX, USA
    Posts
    1,977

    Default Shielded cables, again.

    I received my chinese 30K galvos yesterday. I will give a review once I have more time to use them. In the meantime, I have a question about the cable between the DAC and the scanner amps. The wire that came with the kit is just normal straight wire but my other scanner set had a shield wire for this. What do you guys use between your DAC and amps (or your DB25 connector and scanner amps if you don't have the DAC in your scanner enclosure)? I only need about 1 foot of wire to reach between the DAC and amps. Is shielded even necessary?

  2. #2
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
    Posts
    3,677

    Default

    If they are differential, you shouldn't need shielding. For short single ended runs you shouldnt need shielding either..
    KVANT Australian projector sales
    https://www.facebook.com/kvantaus/

    Lasershowparts- Laser Parts at great prices
    https://www.facebook.com/lasershowparts/

  3. #3
    Join Date
    Jul 2007
    Location
    Slovakia Europe
    Posts
    24

    Default Re:

    I always use shielded wires (cables) by routing analog signals.
    It doesn't matter if it's inside or outside enclosure, short or long distance.
    I think it's a good habit. 1 foot is about 30cm, I would definitely use shielded wire.

    Stefan

  4. #4
    Join Date
    Dec 2006
    Location
    Pflugerville, TX, USA
    Posts
    1,977

    Default

    The scanner amps accept differential inputs but I only have single ended on the DAC. So to be safe I guess shielded is what I will do. Did you make yours? Did you use audio cable?

  5. #5
    Join Date
    Jul 2007
    Location
    Slovakia Europe
    Posts
    24

    Default Cable

    If I need to connect unbalanced output (single ended) to balanced input (differential) I always do it according picture. You can use standard audio cable. Sorry for the picture quality. I was in a hurry :-)

    Edit: Good links about (un)balanced I/O:
    http://www.dself.dsl.pipex.com/ampin...d/balanced.htm
    http://www.jensentransformers.com/an/an003.pdf
    Attached Thumbnails Attached Thumbnails cable.gif  

    Last edited by pishtak; 07-19-2007 at 06:24. Reason: Links added

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •