RigPix Database - Kenwood/Trio - JR-310,JR-310 Amateur-R Kenwood, Trio-Kenwood Inc.; Komagane, build |Radiomuseum.org,Unicomradio - The Trio JR-310 is a classic communications receiver that holds a special place in the history of amateur radio. Manufactured by Trio-Kenwood in the 1970s, this receiver was well-regarded for,トリオ JR-310,Trio/Kenwood Jr-310 3.5Mhz To 50Mhz Receiver Vintage Receiver Shortwave Radio | eBay,