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Reply to "Question: How to change Variable to Fixed Channels and use two Power Supplies"

Note that I have only used AC on my TIU's in passive mode.  I use DC on a fixed channel on the bench for loading sound and chain files.  I don't know how they're react to passive connections with DC, though I suspect it should be the same as AC.

In passive mode, the setting of the variable channel to fixed mode should have no effect, so I don' think that's an issue.

FWIW, I think I'd have a 22uh choke between the power supply and the track, the TIU output should NOT go through the choke.  I'm guessing the DC supply will have a pretty significant capacitance, and that likely will affect the DCS signal since you're impressing it on the output of the DCS signal generator.  Here's three that should be suitable: High Power 22uh Chokes

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