Faulty Speaker Cable

Discussion in 'The Workbench' started by Gibson_83, Jan 7, 2017.

  1. GT08

    GT08 Active Member

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    Just to keep this in perspective (as I often try to do LOL).
    I thought I would re-test my faithful moulded connector speaker cable, supplied with Cab/Amp over 17 years ago and has NEVER failed me.

    Tested with A MEGGER BM80

    Conductivity Tip to Tip < 0.05 Ohms.
    Conductivity Sleeve to Sleeve < 0.05 Ohms.

    At 500vdc
    Insulation Resistance Sleeve to Tip > 45 Gig ohms.

    At 1000vdc
    Insulation Resistance Sleeve to Tip > 35 Gig ohms.

    Conclusion:-

    What a brilliant set of results they are.......beat that!

    A reality check for some I'm sure.
     
    Last edited: May 23, 2017
  2. Gibson_83

    Gibson_83 Member

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    Well without your help I wouldn't know the difference between a good or bad cable, I always just went for brand names having no electrical knowledge.

    thanks again
     
  3. Gibson_83

    Gibson_83 Member

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    Got the official verdict from Mike Soldano and DeYoung transformers, and the amps been working all good since then :)

    Though it's very bad for a tube amp to operate with no speaker load, it
    sounds like your amp survived just fine. The SLO-100 is a very rugged amp
    and I designed it to be able to occasionally endure less than ideal
    operating conditions. Because your amp never blew the 1 amp fuse and is
    still working fine after the speaker cable incidents, you have nothing to
    worry about. Output transformer failures are almost always catastrophic -
    that is to say that if you did do any damage to the output transformer,
    you'd certainly know it. The amp would have little or no output volume, and
    if it did make any sound at all, it would be very fuzzy and distorted (not
    in a good way.



    If everything is working fine, the transformer is most likely fine. The transformer is designed to handle some over-voltage and current spikes.

    Design Engineer
    DeYoung Mfg., Inc.
     
  4. ampmadscientist

    ampmadscientist Well-Known Member

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    In your bathtub.
    "What a brilliant set of results they are.......beat that!"

    I test cables like that, at 1000V-1500V on a daily basis.

    ALL SPEAKER CABLES SHOULD BE TESTED LIKE THAT,
    but also a FLEX test to make sure that is maintained, when the cable is bent and twisted. This is what you really want to know:

    Is the speaker load steady, even under vibration and shock?
    Cause THAT'S what happens when an amp is played on stage. That's the REAL test.
    This is where junk cables fail.
     
    chuckharmonjr likes this.
  5. Gibson_83

    Gibson_83 Member

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    Yeah thats the thing, if I hadn't had this hassle with the shitty cable I wouldn't have learned from you guys and would have gone on using those unaware. So thats one positive from all this all, and the cable has been fine under gigging and high volume.
     
    SG~GUY likes this.
  6. GT08

    GT08 Active Member

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    COME ON THEN.......PUBLISH THE RESULTS FOR YOUR CABLE/S.
     

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