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Using a different mains adapter

Discussion in 'Audio Visual' started by Coaster, 20 Jan 2019.

  1. Coaster

    Coaster

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    Ive posted here, as this forum section seems more related to the device and power supply issues

    Ive a defender stv sonic cat repeller with a 9 volt, 6.4 amp adapter.
    The adapter usually lasts a year before failing and are £14 to replace. It's ite compliant also.

    Ive seen other adapters that not only cheaper, but more importantly I believe will last longer. A different make of repeller's adapter has lasted 12 years 24/7 and still running
    One replacement adapter is a 9 volt, 1 amp and with short protection.

    Are there any issues I've overlooked in replacing the adapter? It will be indoors, with the lead going through the wall to the repeller outside.
     
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  3. flameport

    flameport

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    If the device requires 6.4 amps (which seems grossly excessive), an adaptor which can only supply 1 amp isn't going to work.
     
  4. rsgaz

    rsgaz

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    Are you sure it doesn't say 6.4VA? Do you have a photo of it?
     
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  5. Coaster

    Coaster

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    Oops, mistyped it 0.6 amp.
     
  6. Lucid

    Lucid

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    What on earth is this repeller device doing that requires 6.4A?!?

    My normal advice when folk ask about replacing power supplies is to match the voltage and and to match or exceed the current. In this case though, the current of the power supply already seems to be excessive.

    The repeller looks like it can be either battery powered or driven from the PSU. If running on batteries, it takes 2x 9V PP3-type. They're about 500mAh a piece, which means that together they can supply 1000 milliamps (1 amp) of current for 1 hour before running flat. Clearly it's impractical, not to mention financially ruinous, to keep replacing batteries every hour, so we can work out that this device doesn't need a lot of current to run.

    I think your plan to change to a better quality 9V 1A power supply is the right move. If that doesn't work, I'd be tempted to bin the repeller and buy a better quality product. Either that, or get some lion poo from the local zoo. :LOL:

    EDIT: You've added a correction as I was typing my reply. Yes, 0.6A makes a lot more sense. Go for the 9V 1A PSU. You'll be safe.


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  7. Coaster

    Coaster

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    Pic, sorry , typing error 0.6 amp output on original adapter.
     

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  9. Coaster

    Coaster

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    Lion poo eh? Don't know how much that woul cost lol
     
  10. rsgaz

    rsgaz

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    As long as this adapter you have found says it is compatible with the repeller, then it's fine.

    In theory you can use any 9v DC adapter which is rated at 0.6A or more, as long as the DC jack on the end is the right size. But, I see in your picture that it has a negative centre pin, which may be harder to track down a replacement without you having to do some soldering.
     
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  11. Coaster

    Coaster

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    Yeah i think it's designed to deter alternatives.
    Will need to do some soldering to swap polarity..
    One thing I'm not sure about is potential damage if shorted on the low voltage end being outdoors. The replacement just states "shortage protection"
     
  12. Lucid

    Lucid

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    To solve the polarity problem, get something like this

    adapter.jpg

    For the opposite polarity, just plug in the adapter pin rotated 180 degrees. Simples :)

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  13. Coaster

    Coaster

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  14. Coaster

    Coaster

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    Great. Saves getting the soldering gear out. Thanks for the help everyone
     
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