RAK-7 46155 RECEIVER 15KHZ-600KHZ Requires external power supply such as 20131 or 6V 2A and 180VDC 45ma originally supplied by 20130 power supply, not included. We have a couple, see elsewhere. Bands 15 – 25Khz, 25 – 43.5khz, 43.5 – 77.5khz, 77.5 – 153khz, 153 – 307khz, 307 – 600Khz Uses six tubes: 4/6D6 2/41 This radio utilizes two stages of RF amplification and a regenerative detector. We do not have connectors for this. Reproduction of manual available, see manual listing. Size: 18 x 16 3/4 x 13 3/8 high. Weight 74 lbs. Shpg Wt 83 lbs.