Alcator C-MOD Weekly Highlights September 15, 1994 Assembly of the OH2L coax is now well underway. The operations remaining include bending, vacuum impregnation, and fitup to the OH2L coil terminal block. The feltmetal sandwich material used between the coax and terminal components is now being produced at a rapid pace. Finally, components for the OH1 and OH2U coax are being completed. Only the the OH2L coax is on the machine assembly 'critical path'. The upgraded power supply for the third ICRF transmitter has arrived and is in position. This system, along with a fourth system still requiring modification, will be used to drive the PPPL antenna. Some minor changes to the cryo system have been made. The flapper valve that regulates cryostat pressure by controlling the GN2 flow through the bus tunnel has been replaced. The old valve was subject to icing on its bearing surfaces. We have also moved all the pressure transducers used to monitor nitrogen pressure in the coils to an easy to reach position, away from the control valves. This change should make the pressure readings more reliable. Miklos Porkolab and Paul Bonoli were at PPPL this week for a meeting on ITER RF. Earl Marmar and Jim Irby were also at PPPL for a meeting on ITER diagnostics.