hi everyone. i have a couple questions about thick film resistors.
1. would they make good dummy loads? it costs about ten bucks for a 1% 100w 50ohm 'non-inductive' thick film resistor on digikey. that is way less then i have seen 100W dry loads go for at the local hamfest.
2. i bought some 50W 0.5ohm thick film resistors to replace the metal oxide resistors i am using on the sources of my IRF510 AB amp. here is the datasheet, they are the tr-50 model:
http://www.seielect.com/catalog/SEI-TR.pdfi thought i was buying to-220 packages but these dont have a screw hole for mounting a heatsink. do you think i might get sufficient cooling if i just mount them flat against the copper board my amp is built on? the copper board is mounted directly to a large heatsink which i have the FETs mounted on.
what sort of heatsink are these resistors supposed to be used with?