HI-TEC DUAL CONVERSION CRYSTAL RECEIVER ONLY CHANNEL 36Mhz 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 631, 633, 634, 635, 637, 639, 641, 643, 644, 645, 647, 648, 649, 650, 651, 652, 653, 655, 657, 658, 659