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Mismatched outputs for current doubling cables


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Posted

Hey guys, recently picked up an Anagram, got it on my board, starting wiring it up and realised that I don't have 4 500mA outputs, but instead 2 500mA outputs, and 2 450mA variable voltage outputs. Right now, I've got two current doublers using those outputs, going into a third doubler that joins them together, with the idea being that I'll end up with 1.9A output for the Anagram, which needs 1.7mA at a minimum. Does anyone see any serious issues with this? From what I know of power supplies, this'll probably put a little more wear and tear on one of the outputs, but I'm not too concerned about that. Mostly I just want to make sure I won't torch the Anagram by accident. 

Posted
2 hours ago, Stub Mandrel said:

How do these doublers work?

 

If they are just commoned wires whichever output has the highest voltage will be doing nearly all the work.

Yeah, just joins the outputs, nothing fancy going on as far as I can tell. 

Posted

I think it's the PSU at risk, rather than the pedal. Regulators aren't perfect, so whichever gives the highest voltage will do all the work until the load drags its output down to the level of the next one and so on... Whether this causes issues depends on several things. If they are just tied internally (in which case you may as well just use one of them) or if they are just a single source and isolated by diodes then you'll be fine. If they are truly isolated and floating, success will depend on how well they are matched.

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