Besides the changes going on with the DEA UHF channels, there seem to be some changes afoot with the Department of State Bureau of Diplomatic Security, http://www.state.gov/m/ds/ .
For many years the primary DoS Field Offices used 409.6250 MHz as their nationwide frequency. But recent installations of new P-25 gear has them using 409.5250 MHz, NAC 293. Dallas, Houston, Boston, San Francisco and Washington DC are currently using the new frequency. Originally when the DoS went to P-25 in New York City and Washington DC, they were using a P-25 NAC of N0f0, but sometimes N293 would show up.
Why the change? If you add 9 MHz to the old frequency of 409.6250 MHz, you end up on the DEA's primary repeater of 418.6250 MHz. Accident? Chance? Or will 409.6250 be the new DEA repeater frequency?
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