A slot-type gaming machine using an expandable symbol array to create a series of sequentially larger symbol arrays with the potential for additional or enhanced awards. A condenser assembly is at least partially disposed in a compartment in a housing and includes a condenser coil forming a second part of the refrigerant path. For at least one of the two encoders, the message is algebraically modified prior to being encoded. The concave lens has a concave surface bonded to the first convex surface of the convex lens.