How to determine Audio Transformer Ratio of 1:10 at Digikey?
Audio transformers are normally specified in terms of impedances. Your 3.4kCT to 4/8/16 transformer is intended to have a primary impedance of 3.4 k&Omega; (center-tapped) when the secondary taps are connected to 4, 8 or 16 &Omega;, as appropriate.

The transformer itself does not actually have a particular impedance, but it does transform impedances. You can infer from these specifications that it has impedance transformation ratios of 3400/4 = 850, 3400/8 = 425 and 3400/16 = 212.5, respectively.

The impedance transformation ratio is the square of the turns ratio, so you can further infer that the turns ratios are approximately 29:1, 29:1.4 and 29:2, again, respectively, and these turns ratios are the voltage ratios you can expect to see.







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