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USB Oscilloscope for Audio Work

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Steve-White:

--- Quote from: Ike Zimbel on May 07, 2021, 03:06:09 pm --- Diesel-electric locomotives are often equipped with "dynamic braking". The actual propulsion in these units is via electric motors in the trucks (bogies, running gear) and when these are not providing traction (ie when the train is coasting, or decelerating) they effectively turn into generators. The current they generate can be routed to resistor grids, which provide a load, which provides dynamic braking to the wheels. And, yes, they have big fans to cool the resistor grids.

--- End quote ---

I was thinking train braking when I looked at them.

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