NASA/Goddard Space Flight Center, Code 219, Greenbelt, MD 20771

66 -- VACUUM TEST CHAMBER SOL RFQ915-80107-921 DUE 083198 POC Maria L. Westman, Contract Specialist, Phone (301) 286-0532, Fax (301) 286-1739, Email Maria.L.Westman.1@gsfc.nasa.gov -- Deborah A. Bittner, Contract Specialist, Phone (301) 286-5387, Fax (301) 286-1739, Email Deborah.A.Bittner.1@gsfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/GSFC/date.html#RFQ915-80107-921. E-MAIL: Maria L. Westman, Maria.L.Westman.1@gsfc.nasa.gov. THIS NOTICE CONSTITUTES AMENDMENT NO. 1 TO THE COMBINED SYNOPSIS/RFQ FOR the Vacuum Test Chamber. Companies shall acknowledge all amendment(s) in their quote. This notice serves as the official amendment to subject synopsis/RFQ and a written amendment will not be issued. The purpose of this amendment is to provide clarification on specifications and to extend the due date. The Top Hat and Extension portions have to same diameter as the collar section; the diameter was reduced on the upper portions of the chamber in order to reduce the overall volume that will need to be pumped out. It is required that there be an interface between the Hat and Extension portions of the chamber becuase there is limited clearance above the chamber. The lengths of the sections were designed such that they can be removed without significant alteration to the room where the chamber will be kept. The anticipated duty cycle of the shrouds is several hours. The payload will typically produce several watts load when operating (typically less than 20 Watts). The pumping station is not to be provided by the vendor. Heaters and temperature sensors are assumed to be an integral part of the shroud system and are provided by the vendors. The critical thermal control area is located on the surface of the base plate. The items that are located within that area will stay within a volume that is only six inches high. The thermal control volume would fit the given cross sectional area to a height of six inches (5x6x6). Aluminum is not acceptable as a material to be used in the chamber. The due date for receipt of offers is extended to 08/31/98. Companies shall provide the information stated in the synopsis/RFQ posted on the NASA Acquisition Internet Service (NAIS) on 07/15/98. The WWW address or URL of the NASA/GSFC Business Opportunities home page is http://procurement.nasa.gov/EPS/GSFC/class.html. Posted 08/13/98 (D-SN236443). (0225)

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