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Topics - R4002

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46
10/11 meters / 11m DX Band Opening Activity 1 March 2022
« on: March 01, 2022, 2150 UTC »

25615 AM 25.615 MHz AM - Weak AM voice here, with roger beeps - presumed taxi cab dispatch
25635 LSB 25.635 MHz LSB - Spanish language chatter, two OMs having a casual CB-like QSO (not a taxi dispatcher)
25695 AM 25.695 MHz AM - Taxi dispatch lady YL speaking Spanish (taxi ID numbers) taxi dispatcher
25985 AM 25.985 MHz AM - Taxi dispatch lady YL speaking Spanish (taxi ID numbers) taxi dispatcher
26055 AM 26.055 MHz AM - Taxi dispatch lady YL speaking Spanish (taxi ID numbers) taxi dispatcher
26105 AM 26.105 MHz AM - Spanish language CBers
26175 AM 26.175 MHz AM - Spanish language CBers
26405 AM 26.405 MHz AM - Spanish language CBers
26515 AM 26.515 MHz AM - Spanish language CBers
26540 LSB 26.540 MHz LSB - Spanish language, likely QSY'ed from 26.555 MHz LSB
26555 LSB 26.555 MHz LSB - Spanish language, similar to 27.455 USB
26565 AM 26.565 MHz AM - Heard mention of "Puerto Rico"
26585 AM 26.585 MHz AM - Commonly used Mexican trucker/CB frequency, very busy
26605 AM 26.605 MHz AM - Spanish language CBers
26705 AM 26.705 MHz AM - BIG signals - lots of splatter from 26.715 MHz and 26.725 MHz
26715 AM 26.715 MHz AM - More big signals, similar to 27005 27015, 27025, 27035, 26705, etc.
26725 AM 26.725 MHz AM - 11 meter Spanish language version of channel 6

47
10/11 meters / 11m DX Band Opening Activity 17 February 2022
« on: February 17, 2022, 1911 UTC »
Mostly Latin American in origin at tune-in at 1800 UTC:

25710 FMCW 25.710 MHz - Center frequency, OTH Radar
25725 AM 25.725 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
25875 FMCW 25.875 MHz - Center frequency, OTH Radar
25965 AM 25.965 MHz AM - Weak chatter heard, likely two-way land mobile users, taxi or trucking company 25 MHz
25985 LSB 25.985 MHz LSB - Portuguese chatter noted at 1901 UTC, decent signals, informal chatter
26005 AM 26.005 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
26100 FMCW 26.100 MHz - Center frequency, OTH Radar
26165 AM 26.165 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
26205 AM 26.205 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
26365 AM 26.365 MHz AM - OMs speaking Spanish, lots of music and noise toys
26375 AM 26.375 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
26445 AM 26.445 MHz AM - Spanish language, sporadic signal
26475 AM 26.475 MHz AM - Spanish language chatter, similar to other 25 MHz and 26 MHz 11m stuff
26500 LSB 26.500 MHz LSB - Spanish language, active frequency
26515 AM 26.515 MHz AM - Several stations mixing together, lots of noise toys/recorded sounds on frequency
26525 AM 26.525 MHz AM - Taxi dispatcher, mixing with SSB QRM from 26.530 MHz LSB
26530 LSB 26.530 MHz LSB - Spanish language QSO
26540 LSB 26.540 MHz LSB - Spanish language activity, QSY'ed from 26.555 LSB almost certainly
26555 LSB 26.555 MHz LSB - Latin American DX calling frequency, very busy at points
26565 AM 26.565 MHz AM - Lots of signals from Latin America booming in
26575 AM 26.575 MHz AM - Lots of signals from Latin America booming in
26585 AM 26.585 MHz AM - Very busy, tons of signals on top of each other, similar to 26.575 AM, 26.605 AM, etc.
26595 AM 26.595 MHz AM - Similar to 26.585 MHz, lots of QRM, music, sound effects, etc.
26605 AM 26.605 MHz AM - Spanish language, some very strong signals
26610 FSK 26.610 MHz FSK bursts, narrowband FSK signals, would have been closer to 26.609 MHz maybe
26625 AM 26.625 MHz AM - OM working at least one other station, Spanish language
26625 FM 26.625 MHz FM - FM signals mixing in with AM QRM - confirmed active FM at 1908 UTC (Spanish language)
26635 AM 26.635 MHz AM - OM doing radio checks, lots and lots of echo (Spanish)
26705 AM 26.705 MHz AM - BIG RADIOS channel, very busy
26765 AM 26.765 MHz AM - Spanish language, possibly taxi cab dispatcher
26785 FM 26.785 MHz FM - FSK signal, 6-8 kHz wide, sounds a lot like POCSAG - likely a pager system
26785 AM 26.785 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch with roger beeps
26820 FM 26.820 MHz FM or CW - Carrier signal dropped in, and then out again, UNID
26845 AM 26.845 MHz AM - Taxi or trucker?  Weak signals, with roger beeps noted
26925 AM 26.925 MHz AM - Several signals mixing in with each other, reminds me of the activity usually heard on 26.935 MHz
26935 AM 26.935 MHz AM - Numerous signals mixing together, Spanish language
26945 AM 26.945 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch, good signals
26955 AM 26.955 MHz AM - Taxi dispatcher YL reading numbers in Spanish with roger beeps
Nearly all 40 legal channels active, some notes:
27095 AM 27.095 MHz AM - RC Channel "11A" - YL taxi dispatcher mixing with some faint FSK data bursts
27195 AM 27.195 MHz AM - RC Channel "19A" - strong YL taxi dispatch lady, the usual FSK in the background
27255 AM 27.255 MHz AM - Several AM signals mixing with at least two different data signals

Above 27365 or so, tons and tons of SSB activity, including somewhat oddball frequencies, like 27.710 MHz LSB, 27.730 MHz LSB and others.
27715 AM 27.715 MHz AM - Taxi dispatcher mixing in with SSB QRM from 27.710 LSB, 27.715 USB and others
27755 AM 27.755 MHz AM -  Taxi dispatcher YL in Spanish on 27.755 AM, can hear taxi drivers replying to her!
27765 AM 27.765 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
27775 AM 27.775 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
27775 LSB 27.775 MHz LSB - SSB freebanders mixing in with the taxi dispatcher
27785 AM 27.785 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
27800 LSB 27.800 MHz LSB - Spanish language chatter
27815 AM 27.815 MHz AM - Taxi dispatcher YL - noted Mexico City taxi cab radio taxi 27.815 AM
27885 AM 27.885 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch
27925 AM 27.925 MHz AM - Heard the intro to "Bad To The Bone" and Spanish language chatter
27965 AM 27.965 MHz AM - Taxi dispatcher YL reading numbers in Spanish - taxi cab dispatch

48
10/11 meters / 11m Pager Data and other activity 10 February 2022
« on: February 10, 2022, 1731 UTC »
More 11 meter action today:

25695 kHz / 25.695 MHz AM - Taxi dispatcher - indicating a band opening to Latin America - YL dispatch taxi lady
25735 kHz / 25.735 MHz AM - Taxi dispatch lady - Spanish language YL reading numbers - YL dispatch taxi lady
25745 kHz / 25.745 MHz AM - Taxi dispatch lady - Spanish language YL reading numbers - YL dispatch taxi lady
25950 kHz / 25.950 MHz FM - Studio Transmitter Link - 25.950 FM, fading in and out
26005 kHz / 26.005 MHz AM - YL dispatcher, weak, presumed Latin American taxi dispatch
26035 kHz / 26.035 MHz AM - Taxi dispatch lady, very strong at points - Spanish
26250 kHz / 26.250 MHz - FM carrier, closer to 26.251 (sort of).  - This is a known UK hospital paging frequency
26415 kHz / 26.415 MHz AM - Taxi dispatcher, Spanish language with roger beeps
26455 kHz / 26.455 MHz AM - Taxi dispatcher, Spanish language - female dispatcher YL dispatch lady
26475 kHz / 26.475 MHz AM - Spanish language chatter, lots of noise and sound effects at points
26505 kHz / 26.505 MHz AM - Spanish language, possibly also taxi cab dispatcher
26515 kHz / 26.515 MHz FM - There seems to be an FM signal mixing in with the AM activity, may be a pager?
26515 kHz / 26.515 MHz AM - Lots of roger beeps and noise toys heard, presumably Latin American origin
26585 kHz / 26.585 MHz AM - Very very busy, Mexican trucker channel, heavy QRM
26635 kHz / 26.635 MHz - European paging frequency, FSK signals noted
26665 kHz / 26.665 MHz USB - Spanish language chatter heard
26730 kHz / 26.730 MHz - Narrowband FSK signals, would be 26.728 MHz USB or 26.729 MHz USB
26805 kHz / 26.805 MHz AM - Spanish language, likely taxi cab dispatcher
26805 kHz / 26.805 MHz FM - FM voice activity noted around 1730 UTC / 1735 UTC
26830 kHz / 26.830 MHz - Strong carrier, no modulation...then disappeared, seemed like a pager
26833 kHz / 26.833 MHz - Narrowband FSK signals
26835 kHz / 26.835 MHz- FSK paging signal - 6-7 kHz wide, can be tuned in 26.835 MHz LSB or USB mode
26859 kHz / 26.859 MHz - Narrowband FSK signals, similar to the ones on 26833 kHz
26892 kHz / 26.892 MHz - Narrowband FSK signals
26935 kHz / 26.935 MHz AM - Very strong signals from Latin America booming in
26954 kHz / 26.954 MHz - Narrowband FSK signals, possibly off-frequency 26.955 MHz 26955 kHz 26950 kHz
27195 kHz / 27.195 MHz - FSK signal burst, every 3-4 seconds, previously monitored, multiple transmitters on frequency
27255 kHz / 27.255 MHz - FM FSK Data Bursts, known US-based data link 27 MHz based system 27.255 FM
27256 kHz / 27.256 MHz - Narrowband FSK signals, off-frequency from 27.255 MHz 27.255
27333 kHz / 27.333 MHz (would be 27.331 MHz USB or 27.332 USB) - FSK strong - mixing with QRM from 27.335
27685 kHz / 27.685 MHz - Narrowband FSK signals, would be 27.684 MHz or 27.683 MHz in USB mode
27765 kHz / 27.765 MHz LSB - Spanish language, very good signals
27815 kHz / 27.815 MHz AM - Spanish speaking taxi dispatcher lady, good signals - likely Mexico City (confirmed user)
27882 kHz / 27.882 MHz - Narrowband FSK signals, might be closer to 27.880 MHz or 27.881 MHz
27885 kHz / 27.885 MHz AM - Taxi dispatcher, Spanish language
27893 kHz / 27.893 MHz - Narrowband FSK signals

49
Noting FSK signals on numerous frequencies in the 26 MHz region, as well as:

26569 FM - Narrow FSK bursts
26610 FM - 26.610 MHz or 26.609 MHz, very strong FSK signal
26635 FM - POCSAG
26695 FM - POCSAG
26705 FM - FSK signal
26710 FM - Narrow FSK bursts
26730 FM - Narrow FSK bursts
26745 FM - Nice paging signal faded in
27195 FM - Very strong data signal - seemed like an AM-modulated series of tones


Also, lots and lots of Spanish language taxi dispatch ladies, including 25.695 MHz, 26.935 MHz, 27.365 MHz (CB channel 36, in-band, nice!), 27.745 MHz and our friends in Mexico City on 27.815 MHz / 27815 AM

At 1630 UTC, some data mixing in with AM voice - another taxi cab dispatcher YL operator reading numbers (taxi IDs) on CB channel 23 - 27.255 MHz / RC Channel.

27755 AM - Taxi dispatcher
27935 FM - French language (yes, in FM mode, and not on UK FM CB CH 34 27.931.25 FM, they're on 27.935 MHz!)

27255 AM - a different taxi dispatcher, multi-tone roger beep, mixing with some (weak) FSK
26.745 MHz at 1638 UTC, the signal is still there, roughly 6 kHz wide, you can tune it on either 26745 USB or 26745 LSB (like many of the paging signals coming out of Europe).  At the same time, the paging or data signal on 26.695 is getting stronger....then both 26695 and 26745 faded almost completely out for a few moments and then came back in.

26665 USB - somebody doing radio tests, whistling
26695 fading in and out
26800 FM - narrow FSK signal
26837.5 or 26838 - narrow FSK signal, would probably tune on 26.840 MHz LSB
27705 AM - Taxi dispatcher
27725 AM - Taxi dispatcher
27775 AM - Taxi dispatcher
27785 AM - Taxi dispatcher
26859 or 26860 - narrow FSK signal, center frequency is just a bit below 26.860 MHz
27900 USB - very strong QSO in Spanish, two OMs having casual QSO, 27.900 MHz USB 27.9 MHz 27.9 USB
25875 USB - center frequency 25.876 MHz or maybe 25876 kHz, another strong data signal

50
10/11 meters / 11 meter activity 29 October 2021
« on: October 29, 2021, 1905 UTC »
At 1900 UTC, hearing some US stations working DX on the good old' 26.915 MHz AM frequency.  Sporadic, but its there.  Sounds like numerous stations on top of each other.  Channels 6 is busy.

Also, hearing FM on CB channel 30 at 1905 UTC - 27.305 MHz FM 27.305 FM

51
10/11 meters / 11 meters 28 OCT 2021
« on: October 28, 2021, 1236 UTC »
First off, happy FM is now legal on CB radio day!

At 1230 UTC the band is pretty quiet.  However, there is some faint traffic on 26745 AM 26.745 MHz AM - it sounds like a taxi dispatcher - female taxi controller reading numbers in Spanish.  26.745 MHz is one of those frequencies that often stays clear because its so close to the "big radio channels" - in this case, 26.705 MHz, 26.715 MHz and 26.725 MHz.  26.735 MHz is channel 19 down one band so its often used by truckers and other business or land mobile users looking for a clear channel.  See also - channel 19 up one band - 27.635 MHz, channel 19 down two bands - 26.285 MHz and channel 19 down three bands - 25.835 MHz.  I've heard local traffic on 25.835 MHz AM numerous times, and it was always truckers.  On most export radios, the legal CB band is Band D, so 25.835 MHz is channel 19 on Band A.  Its often easier to simply flip the band switch and leave the channel selector knob alone.  Need a clear channel?  Well, you're both already on CB channel 19 27.185 MHz..simply flip the band switch from D to A and you have a clear frequency. 

Also noting some activity on channel 7 - 27.035 MHz AM - appears to be Latin American stations

1400 UTC - the band appears to have quieted down a little bit...checking numerous KiwiSDRs on the US East Coast and it appears like things are pretty quiet

52
Here is a list of active paging and telemetry frequencies - all European in origin.  All frequencies are confirmed as active as of October 2021.  Many of these systems transmit an "idle" signal every 2-10 seconds, even if no data is being sent.  Others only transmit when needed. On the more active 26 MHz frequencies, several different signals may be noted on the same frequency.



Based on listening on several European SDRs:


26150 kHz 26.150 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26200 kHz 26.200 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26250 kHz 26.250 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26300 kHz 26.300 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26350 kHz 26.350 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26400 kHz 26.400 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26435 kHz 26.435 MHz - POCSAG hospital paging/other modes - noted use in UK
26450 kHz 26.450 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26550 kHz 26.550 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26555 kHz 26.555 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26600 kHz 26.600 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26610 kHz 26.610 MHz - POCSAG and FSK data, includes offset frequencies 26.608 MHz, 26.607 MHz
26645 kHz 26.645 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26650 kHz 26.650 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26655 kHz 26.655 MHz - POCSAG - narrow - noted in mainland Europe
26670 kHz 26.670 MHz - POCSAG - wide and narrow
26695 kHz 26.695 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26700 kHz 26.700 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26705 kHz 26.705 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26745 kHz 26.745 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26750 kHz 26.750 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26755 kHz 26.755 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26845 kHz 26.845 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26850 kHz 26.850 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26855 kHz 26.855 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26900 kHz 26.900 MHz - Telemetry FSK signals - noted in use mainland Europe
26945 kHz 26.945 MHz - Telemetry, paging and 2-watt data link systems
26950 kHz 26.950 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26955 kHz 26.955 MHz - European paging, hospital pager data telemetry - POCSAG and other modes
26960 kHz 26.960 MHz - Telemetry, paging and 2-watt data link systems
26995 kHz 26.995 MHz - R/C Channel worldwide data link and telemetry
27002 kHz 27.002 MHz - POCSAG narrow POCSAG wide (offset frequency)
27007 kHz 27.007 MHz - POCSAG narrow and FSK telemetry (offset frequency)
27045 kHz 27.045 MHz - R/C Channel worldwide data link and telemetry
27095 kHz 27.095 MHz - R/C Channel worldwide data link and telemetry, Eurobalise downlink (train data radio system)
27120 kHz 27.120 MHz - FSK data link signals noted here on German and Swiss SDRs
27145 kHz 27.145 MHz - R/C Channel worldwide data link and telemetry
27190 kHz 27.190 MHz - Paging - data links and telemetry center frequency (confirmed active late October 2021)
27195 kHz 27.195 MHz - R/C Channel worldwide data link and telemetry
27200 kHz 27.200 MHz - Paging - data links and telemetry center frequency (confirmed active late October 2021)
27250 kHz 27.250 MHz - POCSAG and other data modes
27255 kHz 27.255 MHz - R/C Channel worldwide data link and telemetry
27300 kHz 27.300 MHz - POCSAG and other data modes
27350 kHz 27.350 MHz - POCSAG and other data modes
27400 kHz 27.400 MHz - POCSAG and other data modes
27450 kHz 27.450 MHz - POCSAG and other data modes


The European standardized or harmonized 26 MHz paging band extends from 26.200 MHz to 26.935 MHz or 26200 kHz to 26935 kHz (according to several sources). 

Others indicate that the band extends from 26.175 MHz to 26.950 MHz or 26175 kHz to 26950 kHz.  The 26.995, 27.045, 27.095, 27.145 and 27.195 frequencies are standardized throughout Europe for model control telecommand radio control RC use.  The standardized 27 MHz ISM band (center frequency 27.120 MHz 27120 kHz +/- 163 kHz for a frequency range of 26.957 MHz to 27.283 MHz / 26957 kHz to 27283 kHz) also applies and the same range is permitted for very low power short range devices - nonspecific SRDs.

The table of frequency allocations breaks the bands down as follows:

26100 kHz - 26175 kHz 26.100 MHz - 26.175 MHz - Maritime Mobile - DSC, marine HF radio, military communications

26175 kHz - 26200 kHz 26.175 MHz - 26.200 MHz - Fixed and Mobile - Fixed service, military mobile

26200 kHz - 26350 kHz 26.200 MHz - 26.350 MHz - Fixed and Mobile - Fixed service, military mobile

26350 kHz - 27500 kHz 26.350 MHz - 27.500 MHz - Fixed and Mobile - CB radio (EN 300 433 band 26.96-27.41 MHz)

27500 kHz - 28000 kHz 27.500 MHz - 28.000 MHz - Fixed, Mobile, Meteorological Aids - Military mobile communications systems, including aeronautical military systems, land mobile military systems

53
Utility / UNID Radio Checks 8000 kHz USB - 1805 UTC 26 October 2021
« on: October 26, 2021, 1810 UTC »
8000.0 kHz USB 8000 kHz USB 8.000 MHz USB 1805 UTC 26 October 2021

Tuned in to hear the very tail end of

"...PAPA on frequency eight thousand...how copy? over"


I know that the frequency 8000 kHz is part of the larger 7300 kHz to 8195 kHz fixed/mobile allocation (yes, I know the lower portion is heavily used by broadcasting and other things and 8000 kHz to 8195 kHz is a shared allocation with maritime mobile / marine mobile radio service - usually simplex operations...)

Could have been a marine operator?  Sounded very professional, more like military or similar.  Have been sitting on frequency for 5 minutes or so and haven't heard a peep after the "how copy? over." transmission

54
10/11 meters / 27.815 MHz Taxi Dispatcher Mexico City DF Mexico
« on: October 25, 2021, 2217 UTC »
Huge band openings lately - tons of taxi dispatchers from 25.615 MHz up through the legal 40 CB band into the uppers 27.415-27.855 MHz and the 27.865 MHz - 27.995 MHz region.

27815 AM 27.815 MHz Spanish lady reading numbers is a taxi cab dispatcher radio dispatch taxi controller - confirmed in Mexico City Mexico DF Mexico.  Useful point of reference when the band is open and the activity on 27.815 mhz is there.  Also our friends on 25.695 MHz 26.105 MHz 26.175 MHz 26.765 MHz 27.215 MHz 27.235 MHz 27.245 MHz 27.255 MHz 27.275 MHz 27.755 MHz 27.765 MHz 27.775 MHz 27.785 MHz 27.825 MHz and others are coming in.

This is a good ballpark point of reference for when 11 meters is open.  Similar to, say, 26.585 MHz AM and nearby frequencies like 26.595 MHz 26.565 MHz etc

55
10/11 meters / 11 meter opening 1630 UTC 21 Oct 2021
« on: October 21, 2021, 1635 UTC »
Hearing lots of Spanish language DX coming in on 26.585 MHz AM (the usual Mexican and Caribbean and other locations) coming in on top of each other.  Lots of music, sound FX, roger beeps/noise toys, etc. as well

Noting activity on some of the other 26 MHz band freeband frequencies.  Haven't checked 26.805 MHz yet, or 26.555 MHz LSB but I presume 26.555 LSB and 27.455 USB will be active too.

56
Hasenberg Switzerland
Grid: JN47ei
4722'41.7"N 821'53.9"E GPS lat/long minutes seconds
47.378250 N, 8.364972 E GPS lat/long coordinates decimal degrees

KiwiSDR URL:  http://hasenberg700m.ddns.net:8073/

Antenna: SIRIO GAIN-MASTER ⅝ wave 5/8 wave 11m 10m CB antenna 25.5-30 MHz
700 meters 2300 feet above sea level

11 meter logs 


25775 FM 25.775 MHz FM - FSK data stream - noted pager frequency
26150 FM 26.150 MHz FM - POCSAG pager - weak, heavy fading QSB at 1316 UTC
26555 FM 26.555 MHz FM - Pager - data bursts, numerous signals on frequency
26607.5 FM 26.6075 MHz FM - Pager - data bursts, offset frequency (see also: 26.600 MHz, 26.605 MHz)
26650 FM 26.650 MHz FM - Pager or data link, only a few sporadic data bursts noted
26670 FM 26.670 MHz FM - Pager or data link, only a few data bursts noted
26705 FM 26.705 MHz FM - Pager - data bursts, some very strong (S7-S9) - nearly constant activity on frequency
26745 FM 26.745 MHz FM - Pager - data bursts, numerous signals on frequency
26750 FM 26.750 MHz FM - Pager or data link - weak
26755 FM 26.755 MHz FM - Pager - data bursts, numerous signals on frequency
26855 FM 26.855 MHz FM - Pager - data bursts, numerous signals on frequency
26920 FM 26.920 MHz FM - FSK data bursts, weak/fair signal at 1325 UTC
27095 FM 27.095 MHz FM - Strong data link data stream, about 2.5 kHz wide, S8-S9 very strong
27350 FM 27.350 MHz FM - Weak paging signal - 7-8 kHz wide, heavy QSB

The UK paging systems seem to make more extensive use of the oddball offsets, including 26.6075 or 26.608 MHz.  Could be heard tuned to 26.610 MHz as well.  Checked a couple UK-based SDRs and noted paging signals all over the 26 MHz band - including on odd offset channels and the usual -5 kHz or +5 kHz offsets (such as 26.695 MHz and 26.705 MHz for the 26.700 MHz center frequency, the 26.845 MHz and 26.855 MHz frequencies for the 26.85 MHz center frequency, and so on.

26.920 MHz is a new one I believe.  Likely a European-based paging system.  The UK SDRs showed at least 10 different paging systems on at once. 

57
10/11 meters / 11 meters is opening up again 1345 UTC 20 Oct 2021
« on: October 20, 2021, 1351 UTC »
11 meters is starting to wake up

58
https://www.youtube.com/watch?v=VrtAHDOtVII

It seems that the data transmissions heard on 27.255 MHz (and the other RC channels) during band openings are not from these paging systems...at least not the Radio Shack PG-99 17-6020 or 17-6023 (which is a 4-watt transmitter, and may work on 26.995 MHz instead of 27.255 MHz...not 100% sure there).

Thanks to Chris S. for providing the SDR and the test transmissions from the RadioShack 7 watt paging transmitter pager system (with stock back of set CB radio antenna). 

Unlike the signals noted on 27.255 and 27.195 lately (27.195 only during band openings) - this system transmits a single FSK signal about 500 Hz from center frequency 27255.0 kHz.  Center of the FSK signal is 27.2545 or 27254.5...usually there are two FSK signals - usually about -2.5 kHz or -3 kHz from center frequency and + 2.5 kHz or +3 kHz from center frequency.


59
Now that FM mode is legal in the USA for CB purposes.

I fully support designating in-band and out-of-band calling channels.  Here's what we have so far.  26.805 MHz FM is already in use, as is 27.600 MHz FM.  So 26.805 FM and 27.600 FM.  In-band CB channels 27, 29 and 31 - 27.275 MHz FM, 27.295 MHz FM and 27.315 MHz FM. 

FM CB Working Channels

CB CH 29 FM - 27.295 MHz - 27.295 FM - CB Channel 29 FM - FM CB Radio Trucker Channel
CB CH 27 FM - 27.275 MHz - 27.275 FM - CB Channel 27 FM - USA FM CB Radio Working Channel

FM CB Calling DX Calling Channels:

CB CH 31 FM - 27.315 MHz - CB Channel 31 FM - USA FM CB calling channel
Freeband 26 MHz lowers low channels 26.805 MHz FM - calling channel 26.805 FM
Freeband 27 MHz uppers high channels 27.600 MHz FM - calling channel 27.6 FM primary
Freeband 27 MHz uppers high channels 27.575 MHz FM - calling channel 27.575 FM secondary


Freeband 11 meter low band 26MHz FM channels 26 MHz 11m CB FM frequencies:

26.805 MHz - low channels FM calling channel 26.805 FM
26.825 MHz - low channels 26 MHz FM working channel 26.825 FM
26.875 MHz - low channels 26 MHz FM working channel 26.875 FM
26.925 MHz - low channels 26 MHz FM working channel 26.925 FM

Freeband 11 meter high band 27MHz FM channels 27 MHz 11m CB FM frequencies:


27.600 MHz - high channels FM calling channel 27.600 FM
27.575 MHz - high channels FM calling channel 27.575 FM
27.650 MHz - high channels FM calling channel 27.650 FM
27.625 MHz - high channels 27 MHz FM working channel 27.625 FM
27.675 MHz - high channels 27 MHz FM working channel 27.675 FM
27.725 MHz - high channels 27 MHz FM working channel 27.725 FM
27.750 MHz - high channels 27 MHz FM working channel 27.750 FM
27.775 MHz - high channels 27 MHz FM working channel 27.775 FM
27.800 MHz - high channels 27 MHz FM working channel 27.800 FM






60
10/11 meters / 11 meters is opening up again 1045 UTC 19 Oct 2021
« on: October 19, 2021, 1048 UTC »
Looks like we might be in for another busy day:

At 1045 UTC:

Hearing two English-speaking OMs on 26.885 MHz AM...heard a third station break in, request radio check...sounds like a local channel (where these guys are, I don't know...) but they've got decent modulation.  Third station is considerably weaker...now a 4th station.  IDs include Jaybird, Tomcat, and others.   "I've got the preamp on and I still can't hear you as well..." "If I can hear you down here, I know they can hear you up there!" "We gonna talk to Possum" "Did you hear Ramblin' Man in The Carolina?"

This is almost certainly a local (regional) channel...

Weak signal noted at 1046 UTC on 26.875 MHz

1049 UTC I heard mention of "500 watts" on 26.885 MHz AM - and now they're working a station in Florida. 

1050 UTC - "he's on one of them big fancy radios" (more English speaking stations) on 26.675 MHz AM

1140 UTC - 27.505 MHz AM and 27.605 MHz AM active
1142 UTC - guys on 27.605 MHz AM switched to FM mode (sounds like they're doing testing) - 27.605 FM...then the frequency went quiet - some weak SSB QRM in the background

1145 UTC - 26.885 MHz AM - US stations still very strong
1145 UTC - 26.675 MHz AM - US stations also good signals
1145 UTC - 26.805 MHz AM - US stations active
1147 UTC - 27.505 MHz AM - confirmed truckers on 27505 - "she got her own policy on the other truck" "primary driver" and other trucker-specific chatter

I checked the legal 40 channels locally with my handheld CB and almost all 40 channels were active.  Channels 6, 11, 20, 21, 24, 25 and others were all quite active.  Some sporadic signals coming in and out on channel 26 and 28.  Heard some SSB activity on 38 and 39.

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Item image   Pirate Radio Stations - Tuning In To Underground Broadcasts by Andrew R. Yoder

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