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Parallel Power Supplies??

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mclamb97

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In order to get more amps for my radio and related equipment, I am thinking of hooking two power supplies in parallel to get the amps up. In the past I tried this with two identical power supplies, each had an amp meter. When there was a demand for current, one supply showed it was delivering all the amps. Just wondering what was going on? Ideally should this not work in parallel?
 

fwradio

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We do this all the time when we build power supply banks. You need to make sure the power supply outputs are isolated from each other. When you have them isolated, try turning off one of them and measuring the voltage. Turn it off and turn on the other. Adjust the voltage for the same. You shoud balance the load better that way.
 

LtDoc

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Sure, it's done, but it isn't as simple as you might think. The draw from each should be equal along with the voltage. Otherwise, one will be working harder than the other resulting in an imbalance. That 'imbalance' will result in the 'lesser' of the two quitting sooner than the other one and thereby eventually harming both power supplies.
You tend to find the commercial/industrial power supplies are more capable of this paralleling than the typical supply for the general public. That certainly doesn't mean it can't be done though.
- 'Doc
 

RiverRat1976

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Can we assume you are trying to operate an amplifier ? I don't see any reason to have to hook two power supplies together when one is cheaper and safer. A good power supply will run a radio all day long of course and I don't recall anyone needing to have more than one radio powered at the same time. A 10 amp power supply for example, will have more amps than you might need anyway. What are you trying to do anyway ?
 
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