Peter, > Just picked up a large fiber barrel for a loading coil duty. It's 23 In > dia. by 32 In tall. It has one end-piece of same filer. Only issue is > with the two steel end rings about the circumference. What is the > liability of having them in the coils proximity?? Lower L, lower Q, due to eddy currents in the "shorted turn." If you can cut them to open the turn, do it. John Andrews