Jchm
Registered User
Join date: May 2011
423 IQ
#1
So i haven't found a power source to use with my Rp 55, they need a 9V 300ma one, the closest thing i found was a 9v 2000ma, 9v 1000ma and a 9v 200ma.

Question is, If I use the 9v 2000ma/1000ma one with my Rp, will it work smooth? or will it work then burn out?

What if i use the 9v 200ma one?

Sorry, I'm a total noob about electronic stuff . lol
Last edited by Jchm at Jan 25, 2013,
Eppicurt
Don't even like pedals.
Join date: Aug 2008
2,594 IQ
#2
The one you found will work fine. It means the power supply can supply up to 1 amp of current, but the pedal will only draw 300mA.
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Jchm
Registered User
Join date: May 2011
423 IQ
#3
Quote by Eppicurt
The one you found will work fine. It means the power supply can supply up to 1 amp of current, but the pedal will only draw 300mA.



Sorry but i updated the post with the others power sources i found lol , you mean the 2000 one right?
gumbilicious
beginner
Join date: Oct 2007
1,236 IQ
#4
Quote by Jchm
So i haven't found a power source to use with my Rp 55, they need a 9V 300ma one, the closest thing i found was a 9v 2000ma, 9v 1000ma and a 9v 200ma.

Question is, If I use the 9v 2000ma/1000ma one with my Rp, will it work smooth? or will it work then burn out?


-ma stands for milli amps, it represents the amount of electric current the power supply can provide.
-your pedal is also rated with an 'ma', this rating represents how much current draw the pedal/device has.

the rule goes that your power supply needs to be able to supply at least as much current as the pedal draws.

so if your pedal requires 300 ma then your power supply must supply at least 300 ma, it can be spec'd to provide more though. so your 1000 or 2000 ma power supplies are adequate.

Quote by Jchm
What if i use the 9v 200ma one?


the power supply wouldn't supply enough current, most likely the device would not even turn on.

as a side note, you should also be paying attention to the polarity of the power supply and the type of plug required. i am guessing the rp55 uses a standard barrel (boss-style) plug. but also pay attention to the polarity, make sure the digitech polarity needs are met by power supply.
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fly135
Cheap Gear Enthusiast
Join date: Jul 2007
831 IQ
#5
In general I find that you can use an underrated supply. So 200ma would likely work. I'd been running a 2000ma rated GNX4 on a 1300ma supply for a while. But I'd only do that keeping in mind that you still want to get the right supply. Feel the wall wart after using it for a while and make sure it isn't getting too hot.

But you can use and ma rating greater than the listed requirement. The funny thing is that the rated max power for the RP55 is 5 watts, but the suggested supply 9V @ 300ma is only 2.7 watts.