Geoffrey wrote:
> Would a room temperature superconductor make a good coil for coil-magnet 
> seismic sensor ?

    I don't see any advantage, as the coil resistance in a coil used for 
a seismic sensor is of little significance. The resistance may be fairly 
high due to the thin wire and large number of turns of the coil, but 
it's easy enough to make high-impedance circuitry to measure signal 
voltage without loading down the coil.

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