thoad@athena.mit.edu (Thomas A. Digiacomo) (08/14/90)
Oh great gods of electrical engineering, I have an urgent request for info on magnetic core materials. I am building a high-frequency, low current, current transformer and would love to know what companies, if any, could supply a small toroid (inner diameter about 2 cm [ ~0.75 in.], outer diam. ~ 3 or 4 cm [~1.25 to 1.5 in.], thickness ~ 1 cm [~0.4 in.]) with a high initial relative permeability (500 to 5000) which will work into the 100MHz range. I realize that in most cases the trade-off between high initial perm and high frequencies limits what I can get. Siemens, for example, has a 1GHz material, but its initial perm is ~8. Most important to my application is bandwidth, so suggestions of initial perm.= ~250, bandwidth= ~200MHz would be gladly listened to. Thank you, and please hurry, I need this ASAP. Tom DiGiacomo thoad@athena.mit.edu