Re: Big DC power supply
When building 'beefy' low-voltage power supplies it's worth designing to have a 4-terminal output; that is, two big terminals for the actual power and two smaller terminals for 'sense' - that way you can compensate for the voltage-drop in the cables between the PSU and the device it's powering.
[When you're throwing tens of amps around, 0.1 Ohms of connecting-cable resistance becomes a big deal: your 'linear' can suddenly become a lot-less-linear if its supply-voltage sags on peaks]
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