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transformer measured L, etc.



Original poster: "Jim Lux by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

It occurs to me that for an idealized transformer, you can measure just the
open circuit inductances to get the turns ratio.  Both windings have
essentially the same core, and in most power transformers, the windings are
reasonably compact, so the inductance will be proportional to the square of
the number of turns.

Therefore: N2/N1 = sqrt(L2/L1)