I am debugging an Echo Base that was built on one of Taylors boards by someone else. He has managed to install 1.5R instead of 1M5 resistors. I dont have any 1M5 on hand, only 1M. I am pretty sure the differences in the switching circuit are negligible, but what effect will putting a 1M in the feedback of U1B have verses a 1M5?
BTW, Taylor, you have the wrong pin numbers on your schematic vs the pcb. U1A 1, 2, 3 should be 7, 6, 5 and U1B 7, 6, 5 should be 1, 2, 3. Feel free to correct me if I'm wrong.