I just found in my "junque" pile, 3 ea Converter CV-253/ALR, still in their original, multi-layer packaging. This single unit takes the place of the tuning units for the APR-1 through 4 and covers 38 to 1000 MHz in 4 bands. I'd like to keep one, but would like to sell the other two. Specs are pretty good for such old gear. Anyone interested? Ken W7EKB