Thanks for your reply, the calibration and the relative adjustments were done when I brought the tracer home a month ago and it passed all of them.
Now the traces are 2 vertical division in the 10 mA, 1A and similar ranges , close to 2 ?vert/div when set to 20mA, 2 mA and similar, a dot finally appears when in 50 mA and so on, in the uA and lower ranges turns as the 10 mA range, with collector 0% and the selection lever centered.
Thanks again guys for helping me out
