DiscFerret disc analysers for sale!

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7 Sep 2011 7 Sep '11

1:08 p.m.

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> lower voltage (a Variac is handy here, it's about the only thing it is > handy for ;-)) since the impedance of the winding will be much lower > with the open magnetic circuit.

Can't you use an incandescent lamp in series with the filament?

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