27.255 MHz Non Stop Data (RCRS) CB Channel 23 - 1920 UTC 04 Nov 2026 [N1NTE SDR]

[R4002]

27255 kHz

27.250 MHz - 27.260 MHz

CB Radio channel 23 - CB CH23.  Shared with RCRS (Class C CB) - Part 95C FCC rules.  25 watt power limit, 8 kHz bandwidth limit, antenna gain is unlimited, antenna must be 60 feet or less above the ground or 20 feet or less above the highest point of the structure holding the antenna (whichever is less), any non-voice mode may be used.   

Most data signals, including this nearly nonstop data stream (MFSK) signal...is roughly 4.5 kHz to 4.9 kHz wide.  Pager signal, or sounds like a paging signals also noted, bandwidth roughly 3.5 kHz, other signals closer to 6 kHz wide.  So that's 6K00F3D emission, 4K50F3D emission, 4K90F1D emission, 6K00F1D emission type, 3K50F2D, 3K50F1D emissions...lots and lots of data signals. 

Yes, there are also AM voice signals on frequency. 

I also wanted to note that the non stop or almost non stop MFSK signal that I usually hear on 27.195 MHz / 27195kHz is coming in (with everything else) on 27.255MHz / 27255kHz now.  27.195MHz is quiet (at least for now, at least on this receiver). 

[Rob.]

I hear this 24/7 on my SDRs. There are also three other similar ones that can be heard on that frequency when skip conditions allow.