Members poomwah Posted December 27, 2009 Members Share Posted December 27, 2009 I have an effects unit that calls for a 9v dc 500-600mah power supply.How important is the amperage? I have a 300 and an 850. Can I safely use either of them? Link to comment Share on other sites More sharing options...
Members lug Posted December 28, 2009 Members Share Posted December 28, 2009 Use the one rated at a higher amperage. That is how much it can deliver. Using the lower one might work but could fritz on you, but the higher is a definate go. Link to comment Share on other sites More sharing options...
Members perrydabassman Posted December 28, 2009 Members Share Posted December 28, 2009 Use the one rated at a higher amperage. That is how much it can deliver. Using the lower one might work but could fritz on you, but the higher is a definate go. Lug-man speak with no forked tongue.... Link to comment Share on other sites More sharing options...
Members poomwah Posted December 28, 2009 Author Members Share Posted December 28, 2009 Thanks guys I was worried the 850 might be too much current and fry something Link to comment Share on other sites More sharing options...
Members willsellout Posted December 28, 2009 Members Share Posted December 28, 2009 I'm awesome Link to comment Share on other sites More sharing options...
Members whiteop Posted December 28, 2009 Members Share Posted December 28, 2009 Use the one rated at a higher amperage. That is how much it can deliver. Using the lower one might work but could fritz on you, but the higher is a definate go. This is true. Many moons ago I went to train to be an electronic tech. As long as the polarity is correct for the jack it's fitting in and the amperage is higher the circuit will only draw the amperage it needs to function. Link to comment Share on other sites More sharing options...
Members poomwah Posted December 28, 2009 Author Members Share Posted December 28, 2009 Sweet, thanks again, so I've got the power supply covered. Now I just need to get the effects unit here. It left cali on the 26. Ups says it will be here the 4th. Damn holidays Link to comment Share on other sites More sharing options...
Members PaulyWally Posted December 28, 2009 Members Share Posted December 28, 2009 Yeah. Something every musician should know: Voltage = PushAmps = Draw Voltage is PUSHED into a device. It is generally a bad idea to use a higher voltage source since that many volts is going to go into the device no matter what. I have successfully used a power supply that is +/- 1 or 2 volts. But in some cases, I've also experienced overheating in the device when going over just a little bit. It all depends on how the device is engineered. If you can't find an exact voltage match, try to go a little under before you go a little over. Going a tad under will work just fine > 90% of the time. Unlike volts, the device will only DRAW as many amps as it needs... regardless of how many are available. You could supply a 9 volt pedal with 1.21 giga-amps of current... and it will only use the .5 to .6 amps (500-600 milli-amps) that it's asking for. As was said though, it is in good practice have a power supply minimally capable of the .5 to .6 amp requirement. If not, the power supply will become over-worked and would probably fry. Link to comment Share on other sites More sharing options...
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