Hello to the list, I am setting up a SB620 for 455 kHz and need the 40-775 coil. Can trade a 40-807 or 40-748 (this last is from the SB610). Or maybe other advice on winding new coil, etc. BTW, somewhere in my researches I read that the 40-746 SB-610 col for 455 kHz is the same as a Miller 12-C2. Hope this helps someone. Thanks and 73 Mike W2IY