Robert wrote: > R-508/ARC is part of AN/ARC-60. Used in light aircraft like the > L-19 and in light helicopters like the H-13. It is also the > A.R.C. R-19 and used in some civilian light aircraft in the late > 40's and 50's. The AN/ARC-60 was still in use in USN T-34 trainers at NAS Corpus Christi in 1972. Mike / KK5F