Turns ratio reflected impedance to the primary is increased, not reduced, by the turns ratio. This includes capacitive reactance.
You should pull this article before the misinformation spreads too widely.
The 1 watt waste for a 4W supply is amazing. Thanks for a good basic article with enough technical information to be useful. This will help in the decision process for the next set of power supplies we select.
Blog Make a Frequency Plan Tom Burke 17 comments When designing a printed circuit board, you should develop a frequency plan, something that can be easily overlooked. A frequency plan should be one of your first steps ...