N6FEG here in the Bay Area has spoken about restoring a SCR-299, the link is from the Military Vehicle Meet at the Alameda County Fairgrounds in Pleasanton, CA. last August. The BC-610 and some of the other items belong to him. I went on the first day of the meet, a Friday, that night a number of us in the Bay Area worked that BC-610 on the short vertical, there were two stations in Fresno County a 150 miles away that worked it too.
http://www.n6cc.com/military-vehicles-and-radios-mvccmrcg