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BAM 1st January 2002 05:21 PM

What's an autoformer?
Will an autoformer let me turn a speaker of any impedance into an 8 ohm load?

GRollins 1st January 2002 05:40 PM

Autoformers are variations on the transformer theme wherein the primary and secondary are, in fact, the same winding. (Variacs are generally autoformers...) Yes, they can be used for impedance matching, however, they suffer from pretty much the same ills as conventional transformers: capacitance, hysteresis, frequency limitations, etc.


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