but most have some sort of internal adjustment. Does it go to full scale
with the cover off?

Yes it now goes to full scale with and without the lid. So the problem
caused by the static charge is solved. But still I cannot determine from the
available pictures whether the needle should be on the last number (+60) or
at the very end of the scale (corresponding to +70). Need somebody to look
at.

73

Tony I0JX