I just caught some traffic on a VHF channel with some radio techs regarding receive sites and signal strengths as well as a radio interface bridge. The conversation was on 173.1625 MHz, N156, and I only heard one side of the conversation most of the time, but did hear a couple of replies from a field unit. I also heard one person ask if they were on the "APX" radio. APX is the Motorola radio series that features multi-band operation in a single radio.
This joins the frequencies of 170.6500 MHz and 170.9500 MHz that are most likely VHF DEA channels that have been heard in the Southern California area.
THE FED FILES - Welcome to The Fed Files blog! This blog was originally built to support the "Fed Files" column in Monitoring Times magazine. Although the Fed Files, as well as Monitoring Times, ended with the December 2013 issue, this blog continues and is associated with the new federal monitoring column, Federal Wavelengths, in The Spectrum Monitor magazine. If you would like to make a comment, pass along a tip or frequency you can send it to my email address, chrisparris @ thefedfiles.com
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