[NJARC] Bar Magnet wanted

[Robert Flory]

Hi All,
I am doing a program on telephony at a school and would like to recreate the device at our museum with the microammeter and bar magnet, to help explain how a dynamic microphone works.  Does anyone have a bar magnet kicking around, or know a good source for stuff like that.  Will also need a zero-center microammeter.

Thanks, 
Rob
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