A coil winding for a rotating machine, the coil winding comprising a single laminated electrical conductor (102; 202), the laminated electrical conductor (102; 202) comprising: a cross-section defined by a B-axis extending in a direction corresponding to a conductor width, and a C-axis orthogonal to the B-axis, the C-axis extending in a direction corresponding to a conductor thickness, a first support lamina, a second support lamina, a single insert, including a high temperature superconductor, disposed between the first support lamina and the second support lamina, the single insert being disposed in a layered arrangement with the first support lamina and the second support lamina, and a filler material surrounding the insert that bonds the insert to each of the first support lamina and the second support lamina, wherein at the location between the first support lamina and second support lamina corresponding to the location of the insert, the width dimension of the filler material on each side of the insert is at least 12.5 percent of a width of the laminated electrical conductor (102; 202); wherein the C-axis tensile strength of the laminated electrical conductor (102; 202) is reliably at least 21 MPa, where the term "reliably at least 21 MPa" refers to a conductor having C-axis tensile test data in which 99.7 percent of the C-axis tensile test data lies within three standard deviations of a mean of the C-axis tensile test data, and the difference between the mean of the C-axis tensile test data and three standard deviations of the mean of the C-axis tensile test data is at least 21 MPa, wherein the coil comprises plural turns of the laminated electrical conductor (102; 202), each turn of the laminated electrical conductor (102; 202) fixed relative to the remaining turns using epoxy; and wherein the C-axis tensile strength of the laminated electrical conductor (102; 202) is reliably greater than the tensile strength of the epoxy, where the term "reliably greater than the tensile strength of the epoxy" refers to a conductor having C-axis tensile test data in which 99.7 percent of the C-axis tensile test data lies within three standard deviations of a mean of the C-axis tensile test data, and the difference between the mean of the C-axis tensile test data and three standard deviations of the mean of the C-axis tensile test data is greater than the tensile strength of the epoxy. a cross-section defined by a B-axis extending in a direction corresponding to a conductor width, and a C-axis orthogonal to the B-axis, the C-axis extending in a direction corresponding to a conductor thickness, a first support lamina, a second support lamina, a single insert, including a high temperature superconductor, disposed between the first support lamina and the second support lamina, the single insert being disposed in a layered arrangement with the first support lamina and the second support lamina, and a filler material surrounding the insert that bonds the insert to each of the first support lamina and the second support lamina, wherein at the location between the first support lamina and second support lamina corresponding to the location of the insert, the width dimension of the filler material on each side of the insert is at least 12.5 percent of a width of the laminated electrical conductor (102; 202); wherein the C-axis tensile strength of the laminated electrical conductor (102; 202) is reliably at least 21 MPa, where the term "reliably at least 21 MPa" refers to a conductor having C-axis tensile test data in which 99.7 percent of the C-axis tensile test data lies within three standard deviations of a mean of the C-axis tensile test data, and the difference between the mean of the C-axis tensile test data and three standard deviations of the mean of the C-axis tensile test data is at least 21 MPa, wherein the coil comprises plural turns of the laminated electrical conductor (102; 202), each turn of the laminated electrical conductor (102; 202) fixed relative to the remaining turns using epoxy; and wherein the C-axis tensile strength of the laminated electrical conductor (102; 202) is reliably greater than the tensile strength of the epoxy, where the term "reliably greater than the tensile strength of the epoxy" refers to a conductor having C-axis tensile test data in which 99.7 percent of the C-axis tensile test data lies within three standard deviations of a mean of the C-axis tensile test data, and the difference between the mean of the C-axis tensile test data and three standard deviations of the mean of the C-axis tensile test data is greater than the tensile strength of the epoxy.