ITEM DESCRIPTION: Naval Surface Warfare Center (NSWC) Crane intends to modify Basic Ordering Agreement (BOA) # N0016425GWP16 to add Klystron Tube Manufacturing and Repair requirements to the overarching agreement. The proposed contract action is for a modification to BOA # N0016425GWP16 for which the Government intends to solicit and negotiate with one source, Microwave Power Products (MPP), 811 Hansen Way, Palo Alto, CA 94304 (Cage Code: 99313) under the authority of FAR 6.302-1 (Only One Responsible Source). For the purposes of this BOA, this modification is to add Klystron Tube Manufacturing, Evaluation, Repair and Rebuild, MPP is the only source that possesses proprietary technical data, specialized testing equipment, and manufacturing processes required to produce, repair, and rebuild the AN/SPS-49 Klystron tubes without causing substantial duplication of costs or unacceptable delays. The set-aside is not applicable to this requirement. All responsible sources may submit capability documents, as appropriate, which will be considered by the agency. However, a determination by the Government not to compete with this proposed contract based upon responses to this solicitation is solely within the discretion of the Government. Information received will normally be considered solely for the purpose of re-evaluating the justification for sole source or limitation of sources and making a determination to change the acquisition strategy to a competitive procurement. The Solicitation and amendments for this sole source action will not be posted to sam.gov and are available only from the POC identified below. This is NOT a solicitation, and a Solicitation will NOT be posted to Sam.gov due to this being a Sole Source BOA that was previously awarded. The modification will be issued directly to MPP. Contractors must be properly registered in the System for Award Management (SAM). Offerors may obtain information on SAM registration and annual confirmation requirements by calling 1-866-606-8220 or via the internet at https://www.sam.gov. Questions or inquiries should be directed to Kori Koss, Code 0231, telephone 812-805-0753, e-mail kori.l.koss.civ@us.navy.mil and Seth Taylor, Code 0231, email seth.t.taylor.civ@us.navy.mil. Please reference the above solicitation number when responding to this notice. Contracting office address is 300 Highway 361 Crane, IN 47522-50001.