Original poster: "Godfrey Loudner by way of Terry Fritz <teslalist-at-qwest-dot-net>" <ggreen-at-gwtc-dot-net> Hello Dr. I bet they jump the prices on the cores for those custom made 16,000 volt transformers you are going to market. Godfrey Loudner > after receiving my last shipment of cores, in early May, and they were > each $100 higher, at $225 per laser cut set. Ouch!