Supply of EIMAC 4-400C Vacuum Tubes

The contract involves the procurement and delivery of EIMAC 4-400C vacuum tubes intended for use in the National Institute of Standards and Technology’s WWV and WWVB radio broadcast systems, which provide authoritative time and frequency signals to the public. The tubes are critical components for maintaining the integrity and reliability of these long-standing broadcast services. Solicited as a subcontract under NAICS code 334419, the opportunity is open for responses until July 29, 2026, with postings made available as of July 22, 2026. Performance of the contract is designated to occur in Boulder, Colorado, where NIST operates its broadcast facilities, and the order is managed under the Department of Commerce, NIST. The requirement is specific to the exact tube model, indicating a high degree of technical precision and compatibility necessity, and no set-aside preferences have been designated for this procurement.