>I'm wondering how to take two power supplys and combine them to form
>something that can share the load between them, and if I've got extra
>supplys, if one dies, the others can cope with that and keep the system
>running.

        High power, low dropout diodes, like that ones used in PC power supplies=
 (hint! hint!). You just connect the two PSUs using diodes to block return=
 currents, and you are done. I use this for my redundant power supply in my=
 computer :o)


        PSU1 -----|>|-------computer-------|<|------PSU2

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