New ac units were installed in buildings I
and II sometime in 2011 (need exact dates). There are control
units in the AC room (adjacent to the computer room in building
one). There are also units (with compressors) on the roof of
building I (two units Lenox) and one unit atop building II (need
brand). The control units inside building 1 were put inside
huffman boxes. The units on the roff are enclosed in aluminum
enclosures with doors for access.
Inside the roof aluminum unit there is what
looks like a computer in a plastic enclosure (about 100 wires
coming in/out). This unit is most likely the unit that
communicates with the controllers down in the AC room. There is
also a printed circuit board mounted in the aluminum box. Tests
showed that most of the rfi comes from the "cpu" inside the roof
- The aluminum enclosure on the roof has a door with a
- It should be replaced by a conductive gasket.
- You will also need to scrape the paint from where the
gasket makes contact with the box and the door.
- It looks like there might be the start of aluminum
oxidation around the edge of the door. This needs to be
- The ac power tube that enters the lower left of the box
leaks the 1408 birdie. The tube may have metal in it but
there is probably a rubber gasket.
- A 80 Mhz comb is also coming from the unit. We see it at
320 (327Rcvr) an 720 Mhz (800 Mhz rcvr).