26-02193 Requirements and Specifications SUPPLEMENTAL DOCUMENTION.pdf

This document is a procurement specification for vacuum tubes required for WWV/WWVB operations. The government requires three types of EIMAC brand vacuum tubes in the following quantities: one 4-400C tube, two 4CX5000A tubes, and two 4CX15000A tubes. Each tube carries a prorated warranty with specific terms based on the part number: the 4-400C includes 12 months or 3,500 hours coverage, the 4CX5000A provides 12 months or 10,000 hours coverage, and the 4CX15000A offers 12 months or 5,000 hours coverage. The specification mandates that all tubes must be manufactured by EIMAC and meet the warranty requirements as listed, with no substitutions or alternative brands permitted.