Hi folks. I have a 2330B that won't bias on one channel, due to a bad trimmer. Out of circuit the trimmer measures "open line" most of the time and jumps to like 1k ohms really quickly. It's supposed to be 300 ohms. Looking on Mouser, this is the closest one I could find. It has to adjust at the top, for accessibility, and none of the 300/330 ohm ones are in stock. Is the 500 ohm trimmer ok?