the resistor sit between the coil and the 12 capacitors thats in the location number r501 on the board if someone has a hc100 please look at it and tell me it should be easy to see being its a plexiglass bottom damn us amp wont tell me they wanted me to send it in but yeah whatever there goes a bad reference for a authorized us amp dealer so i guess we arent gonna do business with them after all please let me know anyone with a hc 100 made in 1999 and maybe other years too