On my last trip out there, in the fall, it appeared they were still using analog, and low band to boot. Motorola portables with long antennas that said Low Band to me. At least that's what the range master out where I was had.
From the Worcester Co DB: Range Control on 140.0875, Police on 138.700, both P25. Units often have their own VHF or UHF portables for internal use. The 38.85 freq is still used for tactical comms. The Army DPW uses Nextel.
Devens has dumped their Lo-Band, and moved to VHF P25. PD and Range control. All military operations on the base are P25. The opposite side of the base, is patrolled by Mass State Police and protected by Devens Fire Department, and MedStar ALS.