>From ray,    "The ARC-1 and later ARC-3 were so successful that they stayed in service long after WW2 with the ARC-3 staying in service into the seventies"  

I bought an ARC 1 from the Navy Salvage yard on Roosevelt Blvd in Jax., FLA around 1971.  It was complete with all crystals, set up for all the right freqs for comm in the Jacksonville area, and I used it for years just to listen to the local aviation band.  Was great until the tuning motor seized on me.  I also found an ARC 27, again complete and functional, plus a control box, and used it also for listening in to military UHF comm.  Since it tuned 220 to 225 which at one time was our ham band, if there would have been anybody to talk to on AM, I would have.  I even put up a 2 yagi array of Cushcraft 220 ants, back then were not that expensive even the 11 element 2 meter was only $18

I worked on the ARC 27's, and the version that was cabinet-less that fit on the 'Biscuit',  a couple years at a depot, and had mine tuned up for max power out on 1 1/4 meters, just in case.

Charlie, W4MEC in NC