Make sure you have your multimeter set for mA & set the dial for the closest number greater than 75mA so the bias reading will be less than the dial setting - then see what figure you get. You're probably using the wrong setting or scale so to speak. As Chuck says warm it up at least 20 min. or suffer more aggravation. It's a great amp, enjoy.
Cary SLI-80 bias help
I purchased a used SLI-80 with upgraded Shuguang Treasure 6CA7 Z power tubes. I decided to check the bias, which Cary says should be 75-100 mA per Channel. Using my GDT-11 meter I put the dial on the A-- portion and selected 200m. When I get the reading it is saying 4.5, obviously far off from what Cary suggests. Am I doing this wrong or is it really that far off? I don't know what effect that would have, but the amp sounds OK as is. I'm worried about truly putting that number at 75-100 in fear my reading is not right. I used this same meter though (it's brand new) to bias my Jolida amp and it was fine. Is 4.5 really 45 in this case?