◆ SpookStack

For ses C] : 570 @ Teed back was monitored. © volume ad tone y = feed back was equivalent to that obtained from a direct monitor of the quplifier itself during the play back.’ The other QI -000rsore in use at the plant were tested on all lines and no su eed back was evident through these machines, DIE Periodic checks have been made of the technical equipment at the Las — Vegas plent end the equips It is believed that the technical aittiounty De developed only on the afternoon of August 22nd, because of the fact that the long distance lines into the Las Vegas Club md race book offices are very frequently used during the day, partioulerly L.D. 7070, and there have been no indications in the past of such a feed back or any other mechanical diffioulty until this inéddent arose. Had there been such a defect existing previously, it is believed that 9 eer a cause of the b2 regular examinations bIO 6 equipment. The equipment was found to be fun pect, including the neon warning li ect, including arming ephones ere in use. Special cont who was operating the plant at the time of this incident, advised the writer that the warning light on boc L.D. 7070 at t flas ile he wa scribing the recorded conversation aid that he immediately turned o: ne play back w and began monitoring the line again. He monitored for a few minutes but heard nothing on the line.. He stated that since the warning lights have sometimes glowed in the past when no one was on the line, probably due to a telephone operator having her telephone cord plug in the subject line jack in the central office of the telephone company or due to the subject telephone instrument being off the cradle, he turned the play back unit on and proceeded to monitor and transcribe the recorded conversation. etioning pro ghts which g perly in every low whe: 16 6ul t=] st