According to recent postings on Radio Reference, the trunked radio system at Luke Air Force Base in Glendale, Arizona has changed frequencies. The system moved from being in the 400 MHz federal band to the 380 MHz DoD managed spectrum.
One listener posted the control channel data he had deciphered:
SYS:3D6
WACN:BEE00
SITE NAC:3DE
RFSS-SITE:01-0E
385.0375
385.7625
385.9750
386.2500
386.5000
386.9750
387.4375
387.7875
387.9750
388.1500
388.3000
388.5750
The system ID and WACN indicate this is part of the larger US Air Force 3D6 networked trunked system, featuring VHF, UHF and 380 MHz systems. This system also serves multiple military bases in the San Antonio, Texas area:
http://www.radioreference.com/apps/db/?sid=7769