The Department of Transportation, specifically the Federal Aviation Administration (FAA), is conducting a market survey for the procurement of seventeen (17) ASR-8 TR Tubes, which are critical components for ASR-8 radars used in the National Airspace System. These tubes, identified by IFS# 010081351 and PN VDS-1141, are necessary to maintain serviceable stock for radar operations. Currently, Communications & Power Industries (CPI) is believed to be the sole source due to their proprietary design required by the original equipment manufacturer (OEM). Interested vendors capable of fulfilling this requirement are encouraged to respond via email to Raymond Lena at raymond.a.lena@faa.gov or Ronald Breaux at ronald.breaux@faa.gov, as the FAA may proceed with a single source procurement if no competitive sources are identified.