tnx guys,
glad i asked.
small correction, i have a 1200A, not 1500A, shunt. not that it's gonna matter anyhow.
it had stamp of 50mV and i was thinking it was good for input to ic but it reads .4 ohm so i don't believe i will be using it.
the 200A is stamped 75mV with .3 ohm on DMM. fat chance to use that also.
with the amp rings, anyone use any of the like before and with good results? i will do more googling to see what i an find.