To: José Maldonado

From: Jon Hagen

Date: Mar. 7, 2003

Subject: Klystron lifting frame

We need to store our old klystrons in the service area building. In particular, we would like to move the 8 klystrons standing in dollies in the transmitter room to the service area building. We don't have crates for these tubes, but they can be kept in their dollies.

The problem is that the building has insufficient headroom to lift the bottom of a klystron to the height of a dolly. Only about 18 inches more is needed. We could install a small cupola on the building's roof to provide this headroom. A simple steel frame under the cupola and attached to an existing roof beam would allow the klystron to be lifted by the eye bolts on opposite sides of its flange. We brought one or two electric winches from Alaska which may be just right for this lifting.

With the cupola and lifting frame installed, we would position the klystron in a crate below the frame, lift the klystron out of the frame, hoist it up, roll the dolly under it, lower it into the dolly, and then roll dolly into the storage area.