PWM For High Frequency Transformer

MisterBill2 said:

Back to the question, again.
With no load current the voltage ration is close to the turns ratio, provided that the core is not becoming magneticly saturated. And normal transformer designs choose to avoid saturation of the core. As soon as current flows, the secondary voltage will drop a bit, though. But still the voltage ratio is close to the turns ratio.

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Sorry, either I'm not understanding or I didn't ask my question correctly. I understand what you are saying about the turns ratio and voltage drop under load. Just want a bit of clarity, as I plan on rectifying the output and don't want to play chicken with capacitors lol.

Let's say the core is not under saturation and these are the transformer specs:

Vin = 19V
Iin = 3A
F = 147KHz (I know it's high but the transformer ran well at this frequency and wasn't tripping short circuit protection on my power supply. I am also using multiple strands of wire for the primary coil)
Duty Cycle = 50%
Np = 5
Ns = 550
Nratio = 1:110
Voltage across primary coil under no load = 50V
Voltage across primary coil under load = 27V

What I'm asking is even though the voltage across the primary coil is 27V, am I still calculating output voltage by multiplying input voltage by turns ratio ie (19V x 110) or am I calculating base on the 27V across the primary coil ie (27V x 110)?