1266 slotUnique custom made hh power neodymium magnets with optimized slot pattern. ... Video-Unboxing and set-up of your AB-1266. AB1266 Phi TC Frequency Response graph. AB1266The Racal 1266 Portable 4-Slot VXIbus Chassis is a low-cost, 4-slot, C-size, VXI chassis, desned and built with ISO-9001 certified quality. This chassis, when used either with