&quot;The Machine as it appeared in 1972-73. You can see random access wiring under Cart 4, which had the ID's and PSA's. The music carts (#1-3) are color coded in order to rotate thru playlist (to the left(cutoff) is the rack with the other carts). The Scully tape machine was for oldies, a second one used to have classical, but at the time of the picture the classics were on carts-I believe #2. The various instruments on the right panel were for compression and to monitor signal parameters on transmitter, so that the operator did not have to leave studio.&quot; - Walter LaRoche, WREK staff 1969-1973 