(Click here if drawing doesn't appear above.) 1 Transmitter cooling room. 2 Oil pumping room. 3 HVPS No. 2 control room (HVPS = High Voltage Power Source). 4 HVPS No. 2 (with bridge crane). 5 Transmitter control room. 6 Klystron room. A klystron is an electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation. Klystrons provided the microwave energy used by the radar system. 7 HVPS No. 1 control room. 8 HVPS No. 1 (with bridge crane). 9 Electrical repair shop. A Tube treatment room. B Electrical repair shop. C PEUT (Personnel, Equipment, and Utility Tunnel). Connected to the power plant and provided access to the underground complex for personnel and equipment. D Corridor. Photo (2001). (442 x 295 = 28k) (768 x 512 = 61k) 002813 Photo by Ron Plante. E Air lock. F Men's room. G STRATCOM communication equipment area. The Strategic Command is the agency that plans and targets all U.S. nuclear forces and issues National Command Authority orders authorizing the use of nuclear force. STRATCOM communication was via a VLF (Very Low Frequency) antenna on the roof of the MSCB's turret. H Mechanical and antenna cooling equipment area (balcony above). I MDS (Material Data System); life support storage J Electrical equipment room. K STRATCOM communication equipment area. L Mechanical and electrical equipment room. M Air plenum No. 1. Air plenum No. 2 is just above at right angle to No. 1. N Mechanical equipment and storage room.