The TSA continues to make changes across the country as it upgrades their radios. They are definitely changing the input frequencies to the repeaters and changing Network Access Codes, or NAC's.
The changes to the input frequencies are likely being done to bring the radio systems in compliance with NTIA guidelines for VHF repeater pairing. Repeater inputs will be mainly in the lower region of the VHF federal band and the repeater outputs and simplex channels will be in the mid and upper portions.
I am continuing to update the TSA frequency page as I get new information. Please check back often for updates - http://mt-fedfiles.blogspot.com/p/tsa-frequency-updates.html
