SONAR REACTIVATION (SQS-51) AKA (SQS-4) 9 THRU 11 JUNE 2008 ON BOARD USS SLATER DE 766 MOORED PORT SIDE TO @ PORT OF ALBANY ALBANY, NY         Work was preformed by ships volunteers aided by Greg Shippie ST1 USN/RET.       All units of the system were opened and inspected for damage. The system was found to be free of damage and appears to be quite clean given the amount of time that it has been inactive. All the vacuum tubes with the exception of a few in the test set are all present.       The output power leads from the voltage regulator were lifted from their terminals and 115vac was applied to them. There was no response when the main power switch was turned on at the control indicator. The power leads were remover from the fuses at the control indicator and 115vac was applied to the line side of the fuses. The power switch was turned on resulting with indicator lights and some action from the bearing servos but not much else. This amount of work was done before June 11th       On June 11th it was found after some time and effort that only 4 of the 7 pairs of power leads had been lifted from the output of the voltage regulator and had power applied.       On June 12th all of the power leads were returned to the output terminals of the voltage regulator. The input leads were removed from their terminals and were traced to the end of a cut cable to the left side of the transmitter unit, these leads will be removed at a future date. Power (115vac) was applied to the voltage regulator output terminals. The main power switch was turned on at the control indicator. The indicator lights came on and after a short time the blower motor in this unit came on. Also all the filaments in the other units lit up. None of the other units had power indicators lit or blowers running. The remaining part of the day was spent trying to find the cause of this problem.       On June 12th after much mental effort it was found that one or more of the power leads that had been removed from the voltage regulator output terminals had been reversed when they were reconnected causing a phase reversal between the units of the system. The leads were removed again and traced back to each unit and reconnected. The leads to the transmitter were left disconnected on purpose as this unit will not be needed for our purposes at this time. It was late in the day when this point was reached and when power was applied at the voltage regulator output the units except the control indicator came on line as if the main power switch was in the on position which it was not. When the power switch was put in the on position the control indicator unit (aka the  stack) joined the other units in the powered up condition. This is not they way it should work, it appears that one of the power leads is still not properly connected still. With the system powered up in this state we had audio output from the system controlled from the gain controls, the bearing circuits are working and the video scanner switch is running. Rapping on the ships hull was clearly detected through the listen mode of operation. This puts to rest the story that the sonar dome had been removed. It is present and the transducer is working as designed.       The power leads will have to be rung out again and put in the proper phase order so that all the units are working together as designed and the main power switch turns on all the units as it should. Also the video display will have to be brought on line by trouble shooting the circuits involved when we are able to obtain the proper books and prints to be use in this effort.                                                                           Greg Shippie ST1 USN/RET                                                                                    Volunteer