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MYRRA 44969 (conforms to 61558-2-6)

Discussion in 'Power Electronics' started by partyanimallighting, Jul 8, 2019.

  1. partyanimallighting

    partyanimallighting

    273
    2
    Oct 22, 2012
    Hi guys, I'm checking a dead DMX output on a Martin RS-485 DMX splitter and I've got a dead 120VAC~10VAC Myrra 44969 isolation transformer. I've searched online at DigiKey, FuturLec and AllElectronics with no positive results. Any ideas where I can source this P/S?

    Thanks!!

    IMAG0104.jpg
     
  2. partyanimallighting

    partyanimallighting

    273
    2
    Oct 22, 2012
    IMAG0106.jpg
     
  3. Martaine2005

    Martaine2005

    2,310
    616
    May 12, 2015
    Have you tried WWW.Myrra.com?
    You can look through the encapsulated transformers. If not, any of the same spec will work.

    Martin
     
  4. partyanimallighting

    partyanimallighting

    273
    2
    Oct 22, 2012
    Yup. Searched the site, even eBay and Amazon. the closest I'm getting to the original voltage on their site is 9VAC and 12VAC. Nothing resembling the original. Checked DigiKey also. Nothing close.
     
  5. Martaine2005

    Martaine2005

    2,310
    616
    May 12, 2015
    May be you should contact Myrra via email or phone.
    Does the 12v one you found have the same foot print? At a push, you could drop 1.5v on the secondary.

    Martin
     
  6. Martaine2005

    Martaine2005

    2,310
    616
    May 12, 2015
    I just found this. No idea about the site though. Or whether the 0450****** number is a part number.

    Martin
     
  7. partyanimallighting

    partyanimallighting

    273
    2
    Oct 22, 2012
    Yup. That's the little devil right there. I suppose you gurus are much more adept at finding parts than I am. Myrra doesn't carry the exact model any more and I was considering going with the 12VAC unit from them as well, once the footprint is identical. It feeds an LM7905 so I suppose whatever voltage comes in, the 7805 will break it down the the correct voltage (speaking like I'm some kind of expert ;);)). I'm also checking AliExpress to see if I can find a reliable substitute. The DMX splitter uses one on each isolated output, so if three outputs aren't functioning, most times it'll be three of these that need to be replaced. The top of this burnt out xformer is really swollen so it failed. Thanks for all the help!!
     
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