To: José N. Maldonado

From: Edgar Castro

Date: 12-8-99

Subject: 430 Slotted Waveguide Installation

This is to confirm that Jon Hagen and I agree that the slotted waveguide can be installed without Parker Seal gaskets between flanges. Of course, the mating surfaces of the flanges must be clean and flat. A bead of RTV can be used as a water seal around the crack between flanges.

Edgar Castro

Head, Electronics Department