Look for 62 and 125 miliohm shunts (2*62 will do for you) rated 100W (or 50A). These are not so hard to find. You can dyi using large cross section manganin or constantan wire (as used in toasters etc). Peter -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu