I plan on placing the regulator circuit of my PSU project above the transformer to save space and make it compact. There is about 0.7" of air gap between the top of the transformer and the bottom of the pcb. Transformer I'm using: http://www.ebay.com/itm/100W-220V-R-Core-Power-Transformer-Selectable-Values-/321220652796 The pcb is just the old school single sided type. Here is the regulator circuit I built Will placing the pcb as stated above be okay? Won't there be interference or something?