Thank you everyone for all of your suggestions.
I am curious, but have no clue as to whether this might be a power issue, or a signal issue. The drop out occurs on straight track, not on a switch.
BTW, this is my first ever post, although I have read posted information often, and find it very useful. Please do not be bashful to suggest if I should have chosen a different Forum subject category for this particular concern.
Thanks again.