How to set PSU?

Author
Post
Essentials Only Full Version
iainkelman
Max Output Level: -89 dBFS
  • Total Posts : 83
  • Joined: 2004/11/22 10:43:03
  • Location: Aberdeen, Scotland
  • Status: offline
2010/07/16 18:10:32 (permalink)

How to set PSU?

Can't find the correct PSU for my discontinued midi controller. I have a Uniross variable voltage PSU, which I want to use with my Behringer UMX61 - DC 9V 100mA regulated - and, though I can see that I've set the voltage correctly, I can't how to set the switch for AC/DC. How can I set the AC/DC switch?

Behringer advised me on a minimum 100mA PSU and my Uniross is a 300. Will this be okay?

I'm not going to experiment with the settings without advice. My brother fried my Dr Rythym 25 years ago and still hasn't given me the 100 quid for it!
#1

6 Replies Related Threads
    Fog
    Max Output Level: 0 dBFS
    • Total Posts : 12302
    • Joined: 2008/02/27 21:53:35
    • Location: UK
    • Status: offline
    Re:How to set PSU? 2010/07/16 18:55:03 (permalink)
    also remember the polarity might be an issue , depending on the type of connection.. is it like say a megadrive / zx spectrum type connector? if so be wary of the polarity being correct also

    #2
    iainkelman
    Max Output Level: -89 dBFS
    • Total Posts : 83
    • Joined: 2004/11/22 10:43:03
    • Location: Aberdeen, Scotland
    • Status: offline
    Re:How to set PSU? 2010/07/16 19:00:24 (permalink)
    Ta. Yes, it's a standard 2mm (I think) jack just like on th old Spectrum. The proper PSU seems to be impossible to find so I really do need to set up the variable one properly.
    #3
    FastBikerBoy
    Forum Host
    • Total Posts : 11326
    • Joined: 2008/01/25 16:15:36
    • Location: Watton, Norfolk, UK
    • Status: offline
    Re:How to set PSU? 2010/07/17 01:46:14 (permalink)
    A device will only draw the amperage it requires so if your device needs 100mA and the supply is capable of outputting 300mA it will be fine. As long as its supplying the correct phase of power ie. DC if the device is DC and AC if the device is AC.


    It should give you details of power requirements/polarity & amperage somewhere near where the supply attaches to the device. It is unlikely that it'll be AC power unless it has something requiring a higher voltage such as a valve.



    Karl
    Author of..
    SWA Cakewalk Sonar 2015 - New features
    Video Contents PDFs
     
    Free Videos
    #4
    zippsinc
    Max Output Level: -81 dBFS
    • Total Posts : 456
    • Joined: 2008/04/15 10:24:10
    • Location: Scotland
    • Status: offline
    Re:How to set PSU? 2010/07/17 20:14:07 (permalink)
    Just to echo the others' advice...

    ...Look at the details on your unit and buy the corresponding PSU. One that is exactly what it requires.

    Safety first my friend.


    Stewart


    Sonar X1d Producer/Pro Tools 9 - Win7 64bit - i7 930 2.8GHz - 6GB DDR3 RAM - RME MultifaceII - RND Portico 5012 & 5016 - Sytek MPX-4Aii - UAD2 Duo/Solo - MoFET76 - API 2500 - Dbx 160x (x2) - Dbx 166 (old revision) - FMR RNC (x2)
    #5
    iainkelman
    Max Output Level: -89 dBFS
    • Total Posts : 83
    • Joined: 2004/11/22 10:43:03
    • Location: Aberdeen, Scotland
    • Status: offline
    Re:How to set PSU? 2010/07/19 11:38:43 (permalink)
    Thanks all. A guy from Behringer has now responded and told me that 300 mA will be okay and advised me to buy a generic PSU from a shop in the US ( even though I told him I live in the UK). 4 big computer music shops here have also said that they don't have a bespoke PSU and advised a generic.  Unfortunately my multi-setting PSU has a switch that will go DC or AC but it doesn't indicate which is which. One way works: the other way will fry my new keyboard. The USB bus is lighting up the lights in the UMX but not making it control midi. Think I'll have to keep using the battery power for now.
    #6
    FastBikerBoy
    Forum Host
    • Total Posts : 11326
    • Joined: 2008/01/25 16:15:36
    • Location: Watton, Norfolk, UK
    • Status: offline
    Re:How to set PSU? 2010/07/19 14:04:50 (permalink)
    Invest in a multimeter. You'll get one just about anywhere in the UK Tesco, Aldi, Halfords, Car accessory shops etc etc for about £10. They are absolutely invaluable not only for mains testing - but testing batteries, checking leads, diagnosing anything electrical. I have one laying around my studio and it gets used regularly, you'll know which way round the switch is in a jiffy.

    Karl
    Author of..
    SWA Cakewalk Sonar 2015 - New features
    Video Contents PDFs
     
    Free Videos
    #7
    Jump to:
    © 2024 APG vNext Commercial Version 5.1