The R5001 marine and general purpose receiver is designed for use in a marine main radio station. The receiver has synthesized operation in the frequency range 10 kHz to 29,999.9 kHz. The receiver is designed for reception of type F1, A1, A2, A2H, A3, A3H and upper-si-deband A3A and A3J signals. It is fully transistorized, and widespread use is made of integrated circuits. These features, in connection with thefactthat no crystal ovens are used, cause the receiver to be ready for operation immediately after having been swiched on. Depending on the power pack installed in it, the receiver can be powered from a 24 V battery or from AC voltages normally occurring in practice. The dimensions match a 19-inch standard rack. Because we are constantly processing the experience gained during the produc-tionand operation of ourequipment, it is possible for minor modifications to occur relative to the information given in this instruction manual. Wherever practicable, however, any corrections will be listed on a correction sheet at the back of the front cover of this manual.