Thanks K Pack,
This is an existing outdoor layout at Sun City, Texas in Georgetown, TX. We had lost connections across the layout when on one side and train on the other. WE have lots of buildings and visitors so very often we cannot follow, so, did the repeaters and think it my be just transitioning between direct HC3 and a repeater causing a brief flash of red.
Check us out!
Redpoppyrailroad.com
The link will go to SCTexas, so, it's OK.