Re: Transformers in parallel?
Yes, that's exactly what the penultimate paragraph in post #36 is getting at - ultimately transformer DCR limits the charging pulses. Which doesn't seem like good engineering to me, as this means you're using far more capacitance than you need, given that you're following up with a voltage regulator - and if you're not, then it's because ripple (and DC precision) doesn't matter in your application anyway.
Hard to put a number on it with all the other variables in play - easiest to measure with a current clamp 'scope probe.
Incidently, this is a much more serious problem with switched mode power supplies that don't have the 50Hz transformer to soften the charging pulses. Active PFC schemes based around boost converters solve this problem rather neatly (and add universal voltage operation and take care of inrush protection too). Active PFC is basically mandatory on anything bigger than 75 watts these days if you want to meet EN61000-3-2.
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