Pedals with charge pumps, voltage question - safe to run at 12v vs. 9v?

Discussion in 'Effects, Pedals, Strings & Things' started by Flatscan, Mar 29, 2015.

  1. Flatscan

    Flatscan Supporting Member

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    I have a few pedals that use internal charge pumps to increase voltage to 18v or perhaps higher. These are typically powered at 9v base load.

    Can I safely run these pedals up to 12v vs. 9v? This would be convenient with my Voodoo 4x4 [extra 12v outlet].

    The pedal in specific is the EQD Warden. I have lots of other pedals that might afford similar opportunities, however.

    Note: I've emailed the manufacturer but not yet heard back.
    [This isn't a complaint. I only emailed them yesterday. I've had awesome service from this manufacturer historically.]

    Note2: I ran the Warden on accident at 12v and it sounded great. I don't want to keep running it at that level, however, if I'm going to torch the pedal.

    Thanks for your help!!!
     
  2. RambleFX

    RambleFX Supporting Member Vendor

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    Regarding note 2, you accidentally got lucky.
     
  3. David B

    David B Silver Supporting Member

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    In general, 9vdc means stay under that voltage. If the manufacturer says you have a higher limit, then use the voltage they suggest.
     
  4. CodeMonk

    CodeMonk Member

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    I agree here.
    You got very lucky.
    All charge pumps are not created equal.
    The MAX1044 IC is rated at max of 10 volts.
    Feed it 10.000001 volts and it dies (According to RG Keen).
    Other charge pumps can handle a little more, but not much.
    The LT1054 can handle up to 15 volts.
    You also have to consider the components AFTER the charge pump as well.
     
  5. Alchemy Audio

    Alchemy Audio Silver Supporting Member

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    +1
    This is the IC in the BYOC Silver Pony and I've replaced a few for customers who accidentally supplied too much voltage to it.
    Also keep in mind the importance of using a quality, isolated power supply - such as Voodoo Labs. I know there have been issues with EHX Soul Food becoming toast when plugged into a One Spot (unregulated) power supply.
     
  6. Gurus Amps

    Gurus Amps Member

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    About Gurus Pedals, yes.. from 9 to 12VDC.. not more or you broke it.
    Wait for the manufacturer reply..
     
  7. jdel77

    jdel77 Silver Supporting Member

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    Stick with 9v input voltage. Some of those chips are very sensitive.
     

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