First found problem when running car outside, so range varied from a couple of feet to probably 50 or 60 feet, and have same problem on bench inside house. I installed the Lynx module into the Futaba aircraft TX I mentioned and performed the same tests with the car performing flawlessly. I had thought it may just be a dry join on a solder joint inside TX, and on inspection, found one where antenna mount is soldered to board. Re-soldered joint and tested again with same result. Was unable to see any other dry joins.