> The readings make sense now I have seen the diagrams.
> 6v AC RMS x 2 = 12v
> 12v RMS = 17 v half peak = 34v peak-peak AC.

You realise that each secondary puts out 37Vp-p and that
the two together in series make 73VAC ?

The figures on the left are the DC resistance BTW. Not good matching
between the two secondaries I thought but V outs are similar

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