Here are the current resistances I'm getting between all power rails on my CS-80 and ground: +15V = 70.3 Ohms -15V = 64.5 Ohms +8.5V = 337 Ohms -6.5V = 878 Ohms +10.6V = 540 Ohms These tests were done with the power off. The -6.5V is low at 878 ohms compared to another owner's 3.95 Kohms on his currently working unit, as well as my 337 ohms compared to his 456 ohms on the +8.5 rail.