I'm doing a high voltage source PCB, where the source is a transformer and controlled by an oscillator. The frequency of the setup is around 75-100kHz.
The transformer type is very similar to this one: https://malaysia.rs-online.com/w... .
My question is if I can make a copper area under the transformer?
Won't stray magnetic fields from the transformer create eddy current in the copper below? And won't this affect the performance of the oscillator?