We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - R4002

Pages: 1 2 [3] 4 5 6 7 8 9 10 11 ... 189
31
Iíve managed to catch a polytone signal (sounds a lot like ROS) on 31.325 and 31.975. 

Apparently these are traffic signal (traffic light) control signals from France. Very low power.  Pretty decent catch during VHF low band opening. 

32
Confirmed via the great folks at the RadioReference skip/tropospheric ducting forum - I am now able to confirm a signal that I'm hearing every time the band is open - 32.180 MHz FM with 77.0 Hz CTCSS.  Spanish language taxi dispatch lady YL dispatcher.


32.1800 MHz FM - 77.0 Hz - Alajuela, Costa Rica Taxi Dispatch - confirmed use
32.1800 MHz FM - 141.3 Hz - Alajuela, Costa Rica Taxi Dispatch - confirmed use

Also 31.2000 MHz FM - 203.5 Hz - Spanish speaking taxi dispatcher - apparently this frequency/tone/user has been logged since at least 1988.  31.200 MHz FM 203.5Hz is still active, I last heard it myself a couple days ago - the same time that 32.180 MHz was coming in very strongly and the 27.5-39.5 MHz Dedicated Fisheries Radio VHF low fishing fleet chatter out of Asia was coming in on 29.775 MHz FM, 30.300 MHz FM, 30.775 MHz FM, 30.900 MHz FM, 31.100 MHz FM, 31.800 MHz FM and other frequencies. 

I did some more searching, and a lot of folks have monitored these comms, including on 29.875 MHz FM, and numerous additional frequencies in the 30-35 MHz portion especially, all with the 25 kHz channel steps, and never with a CTCSS or DCS tone/code.

33
26765 AM - 26.765 MHz AM is coming in almost daily now, same with 27755 AM - 27.755 MHz AM.  Both of these are confirmed taxi dispatch frequencies for Matamoros Mexico.

Also frequencies

26905 AM - 26.905 MHz AM - Taxi dispatch - Mexico City (Mexico, D.F.)
27765 AM - 27.765 MHz AM - Taxi dispatch - Mexico City (Mexico, D.F.)
27775 AM - 27.775 MHz AM - Taxi dispatch - Mexico City (Mexico, D.F.)
27785 AM - 27.785 MHz AM - Taxi dispatch - Mexico City (Mexico, D.F.)
27815 AM - 27.815 MHz AM - Taxi dispatch - Mexico City (Mexico, D.F.)

Among many others, I'm sure.  27.785 MHz is an interesting one, since it's only 3.75 kHz away from UK FM CB channel 19, which is 27.78125 MHz (or 27.781 MHz, or 27.781.25 MHz or 27781 FM 27781.25 FM...).  The other day I actually heard the taxi dispatch lady on 27.785 MHz AM mixing with UK FM CB signals on 27.781 MHz FM! 

34
10/11 meters / Re: 26.540 LSB
« on: January 12, 2023, 1204 UTC »
Yessir, 26.540 MHz LSB is actually an alternate or QSY frequency for 26.555 MHz LSB.  26.555 LSB is often really really busy.

Others include 26.545 LSB, 26.560 LSB, 26.570 LSB and others.  But 26.540 MHz seems to be the most popular. 

Also: 26.225 USB, 26.230 USB, 26.235 USB and of course 27.455 USB and 27.515 LSB.  26.705 AM, 26.715 AM and 27.065 AM are also very popular, next to 26.585 AM and 26.595 AM.

35
Interesting,

So the traffic you're hearing on 29.875 MHz FM is similar to what I've logged on:

29.775 MHz FM
30.000 MHz FM
30.025 MHz FM
30.100 MHz FM
30.300 MHz FM
30.775 MHz FM
30.900 MHz FM
31.100 MHz FM
31.800 MHz FM
31.900 MHz FM
32.175 MHz FM

And others, all following the 25 kHz channel steps, all without a CTCSS or DCS tone/code...

It appears to be fishery radio service, using equipment designed specifically for fleet radio communications:

25 watt power
FM voice mode and FSK data mode (to transmit GPS location)
480 channels, 25 kHz spacing
27.5 MHz to 39.475 MHz

27.500 MHz FM - Channel 1
27.525 MHz FM - Channel 2
27.550 MHz FM - Channel 3
39.475 MHz FM - Channel 480

31.100 MHz FM fishery radio signals:

https://www.youtube.com/watch?v=aVSM84fMShg

https://www.youtube.com/watch?v=iBqIHvWo-Mk

https://www.youtube.com/watch?v=FFll-usSQqo

https://www.youtube.com/watch?v=Mc59ihfl6OI

https://www.youtube.com/watch?v=cRL2cL5sdcw

https://www.youtube.com/watch?v=oUKQFvsOc-A

30.775 MHz FM fishery radio signals:

https://youtu.be/RJZl7Ic6VgQ

https://youtu.be/7ce5kJPhSxY


30.300 MHz FM fishery radio signals:

https://www.youtube.com/watch?v=EQ8xy1sTyLk

https://www.youtube.com/watch?v=8hQAfNIj_mI

https://www.youtube.com/watch?v=vbmKAJPjgD4

31.800 MHz FM fishery radio signals:

https://www.youtube.com/watch?v=RBGnBMnD9QI


And those are just the ones I managed to get video of.  480 channels, 27.500 to 39.475, straight sequence.  So 29.875 MHz FM is channel 100 on these radios.  Look up FT-801 Fishing Boat Radio or FT-801 Dedicated Fisheries Radio. 

The bands have been alive lately and a lot of VHF low band 29.7 to 50 MHz signals have been coming in (along with 11m signals), but what sets these Asian fishery radio signals apart is the fact that they have no CTCSS (PL tone) or DCS (DPL code) selective calling signals transmitted with them.  They use regular old carrier squelch (CSQ).  99% of the land mobile (and military) comms I've heard in the 30-50 MHz band (and the 29.7 MHz to 30 MHz band) have a CTCSS tone or a DCS code transmitted, to prevent QRM from skip propagation...exactly this situation. 

Yes, the 25 kHz steps do match with the standard 30.000 MHz to 87.975 MHz military FM tactical radio plan, but the military use a 150.0 Hz tone squelch system as well.  It's not one of the standard land mobile tones, but my receivers do decode it as 151.4 Hz (the closest land mobile tone to 150 Hz).  None of these fishery transmissions with the Asian language have had any tones at all, regardless of signal strength.    There are plenty of other land mobile radio systems on these frequencies (a good example is 31.200 MHz, which fits within the 25 kHz channel steps 27.500 MHz to 39.475 MHz band plan) but the traffic on there is in Spanish and has a CTCSS tone (usually I hear signals with a 203.5 Hz tone, but other tones have been logged as well, it's Latin American and Caribbean taxi cab dispatchers).   

By process of elimination, I think what you heard on 29.875 MHz FM is one of these VHF Low FM "Dedicated Fisheries Radio" 27.5-39.475 MHz 480 Channel FM Fishing Boat Radio systems....or you were hearing a different land mobile system that happened to also be on 29.875 MHz.  There's actually a lot of stuff within that little piece of bandwidth between 29700 and 30000.  In the USA the frequencies 29.710 MHz, 29.730 MHz, 29.750 MHz, 29.770 MHz and 29.790 MHz are active land mobile (business radio) frequencies.  They are still used and are still active.  Of course there are freeband CB operators there, but not as many as there are below 28 MHz.   

Here is the full channel to frequency list:

https://www.hfunderground.com/wiki/CB#China.2FHong_Kong_Chinese_27.5-39.5_MHz_HF_and_VHF-low_Fishery_Marine_Band_FM_Fishing_Radio



36
Also, here's a great example of where at least some of these guys are sourcing their gear (with music, sound effects, 35 different roger beeps, music you can play under your voice while you talk, etc).

Mr. X CB Shop

The YouTube channel is quality stuff. 

https://www.youtube.com/c/MRXCBSHOP

Here's the videos list:

https://www.youtube.com/@MRXCBSHOP/videos

Lots of the radios that this shop has made for folks are in the 100 to 500+ watt output class (ones that include a large amplifier as part of the radio itself and others with an amplifier mated to the radio), such as the Galaxy DX 98VHP, DX 94HP, Superstar 158FFB4, Superstar 158EDX Ranger Long Horn N6, Stryker SR 655 and SR 955 radios, Ranger RCI-69VHP, Ranger RCI 99N4, Ranger RCI-99N2, Ranger RCI-2970DX, Ranger RCI-2970N4, the various other Magnum S9 series rigs, Connex 4600, Connex 4300, Connex CX36HPF-400 and so on.

The Ranger "Long Horn" rigs are apparently really dirty, and some CB shops refuse to sell them because of the amounts of harmonics and spurs they produce compared to the other radios on the market (including all the other radios made by Ranger - that would be: all Galaxy, Superstar, Ranger, RCI, Connex, Mirage, Texas Ranger, etc. branded radios).

https://www.youtube.com/watch?v=LOI1bsrOe_4



37
These guys love using the "low channels" (frequencies below CB channel 1).  The "low band" or "band C" seems to be where they hang out the most (26.515 MHz to 26.955 MHz). 

26.555 MHz LSB - Latin America SSB DX calling frequency (see also: 27.455 MHz USB) - stations will QSY from 26.555 LSB onto 26.545 MHz LSB, 26.565 MHz LSB, 26.525 MHz LSB, 26.540 MHz LSB, 26.570 MHz LSB and others.

26.515 MHz AM - I've heard taxi cab companies, US stations and lots of Latin American chatter on here
26.525 MHz AM - alternate AM frequency, also used for SSB freebanders (in LSB mode)
26.535 MHz AM - alternate AM frequency, taxi cab dispatcher (in AM mode) and SSB freebanders (in LSB mode)
26.545 MHz AM - mostly used for SSB activity (in LSB mode), but I've heard AM signals on here too
26.555 MHz LSB - Yep, very busy
26.565 MHz AM - alternate frequency
26.575 MHz AM - alternate frequency
26.585 MHz AM - big radios, big power - Mexican trucker and freebander frequency
26.595 MHz AM - alternate frequency when 26.585MHz AM is just going nuts (as it often is)
26.605 MHz AM - very popular
26.615 MHz AM
26.625 MHz AM
26.635 MHz AM - very popular with Mexican freeband CB operators and others
26.645 MHz AM
26.655 MHz AM - another popular frequency
26.665 MHz AM - I've noticed Spanish language chatter on here a lot more lately
26.675 MHz AM - US stations, Spanish language also noted
26.685 MHz AM - Spanish language, also taxi cab dispatcher YLs, also US truck drivers (identified as ABF (trucking company) use?)
26.695 MHz AM - Mexican accented Spanish, also big radios out of Florida, Puerto Rico and Caribbean area
26.705 MHz AM - BIG radios out of Puerto Rico and other areas (see also: 26.695 AM, 26.715 AM, 26.725 AM)
26.715 MHz AM - BIG radios (similar to 26.705 AM)
26.725 MHz AM - alternate to 26.705 MHz AM and 26.715 MHz AM
26.735 MHz AM - Lots of truck drivers on here, but also Latin American traffic
26.745 MHz AM - taxi cab dispatch YL (Spanish language) heard here
26.755 MHz AM - Spanish language and English speaking freebanders
26.765 MHz AM - Mexican taxi cab dispatcher, female YL dispatch lady, very strong signal at points
26.775 MHz AM - I've heard a lot of stations out of the southern USA on this frequency
26.785 MHz AM
26.795 MHz AM
26.805 MHz AM - Spanish language stations, note: this is unofficially now a FM frequency 26.805FM
26.805 MHz FM - US freeband CB operators, FM mode, very popular 26.805 FM or 805 FM club
26.815 MHz AM - US stations, mostly
26.825 MHz AM
26.835 MHz AM
26.845 MHz AM
26.855 MHz AM
26.865 MHz AM
26.875 MHz AM
26.885 MHz AM - US stations, including those that QSY'ed from 26.915 AM, etc
26.895 MHz AM
26.905 MHz AM - Known taxi dispatcher frequency, also US freebanders QSYed from 26.915 AM
26.915 MHz AM - BIG radios, commonly called "36 low" or "915"
26.925 MHz AM - Lots of different users on here
26.935 MHz AM - I've heard lots of Spanish here, also taxi dispatcher lady
26.945 MHz AM - US stations, running power, and Spanish speaking taxi cab dispatch comms
26.955 MHz AM - Taxi dispatcher (Spanish), and also lots of US freebanders

The lower channels, that is, Band A (25.615 MHz - 26.055 MHz) and Band B (26.065 MHz to 26.505 MHz) so overall

25.615 MHz up to 26.505 MHz is very popular with

Freeband SSB operators, usually clustered around 26.285 MHz USB, 26.225 MHz USB and a handful of others

Taxi cab companies (all over!)
Truckers (mostly on 25.835 MHz AM but heard all over)
Hunters, hunt club channels
Forestry, farmers, etc.  using a "clear channel"


From what I've read, many CB users in Latin America are either using:

Export radios (aka "10 meter" radios) which cover:

25.615 MHz to 30.105 MHz - the new "standard" - Chinese rigs
26.515 MHz to 27.855 MHz - "120 channel" CB rigs, usually with a "LOW/MID/HIGH" band switch (CB band is "MID")
25.615 MHz to 27.405 MHz - Hunting radios, with A-B-C-D band switch (CB band is "Band D")
26.065 MHz to 27.405 MHz - Hunting radios, with B-C-D band switch (CB band is "Band D"
25.615 MHz to 28.305 MHz - the 6-band "240 channel" A-B-C-D-E-F band standard plan (CB Band is "Band D")
25.165 MHz to 28.755 MHz - the 8-band "320 channel" band plan
24.265 MHz to 29.655 MHz - Superstar 158EDX and several other radios

Or, modified CB rigs that have had frequency expansion modifications done on them,

80 channel modification:

26.515 MHz to 27.405 MHz - channels 1-40 are the same as regular CB channels 1-40, channels 41-80 are the "low channels"
26.515 MHz to 27.855 MHz - very popular "120 channel" mod or "expansion" modification, gives the user three sets of 40 channels -  low channels (26.515 - 26.955 MHz), mid channels/CB channels (26.965 - 27.405 MHz, the standard CB band), and high channels (27.415 - 27.855 MHz).  Most of these radios also include the addition of a +10 kHz switch or a "+10kc" switch, allowing the user to access the skipped channels, LesComm, Viagra, Expo 100 and numerous other kits include kits to turn a regular 40 channel CB into a 120 channel CB. 

Other kits include the addition of the "B Band" (26.065 MHz - 26.505 MHz) for a total of 120 channels, or even more coverage (for example, 25.995 MHz to 28.045 MHz, 26.005 MHz to 27.995 MHz, 26.695 MHz to 27.965 MHz, etc.

38
10/11 meters / 11m Band Activity 30 DEC 2022
« on: December 30, 2022, 1311 UTC »
Checking the eastern and central European SDRs this morning, along with East Coast USA SDRs, looks like Latin American chatter is already starting to pop up on the usual in-band channels.

On Polish and German SDRs, noting POCSAG pager activity on 26.500 MHz, 26.550 MHz, 26.600 MHz, 26.650 MHz, 26.695 MHz, 26.700 MHz, 26.745 MHz, 26.750 MHz, 26.800 MHz, 26.900 MHz, 26.940 MHz, 26.945 MHz, 26.950 MHz, 26.955 MHz, 27.300 MHz, 27.350 MHz, 27.450 MHz and 27.845 MHz and offset frequency 27.847 MHz / 27.848 MHz as well as 27.850 MHz.


39
10/11 meters / 11m Band Activity 29 DEC 2022
« on: December 29, 2022, 1325 UTC »
Noting some FM voice on 27275 (CB Channel 27) and 27295 (CB Channel 29).

Also the usual Latin American frequencies are starting to light up, including


26525 LSB 26.525 MHz LSB - alternate frequency (likely stations that QSY'ed from 26.555 LSB)
26555 LSB 26.555 MHz LSB - SSB calling (low channels)
26585 AM 26.585 MHz AM - Mexico
27065 AM 27.065 MHz AM - Very big signals (CB Channel 9)
27455 USB 27.455 MHz USB - SSB calling (high channels)

Some very faint POCSAG paging signals noted on 26.695 MHz. 

The usual FSK bursts on 27.255 MHz RCRS channel / CB Channel 23

Nothing on 27.195 (yet) but I imagine the MFSK multi-frequency data signal will show up there as well.


40
10/11 meters / Re: 11m Band Activity observation 21 Dec 2022
« on: December 27, 2022, 1250 UTC »
1900 UTC, 27.383 mhz lsb. A group of knuckleheads deciding to create their own channel 2khz under .385. Creates the usual qrm wars that one might assume. The group blows off anyone complaining, of course. ;-)

That's always fun.  They're on what, 27.383 MHz LSB? 

Would make more sense to use 27.380 MHz or 27.390 MHz.  During the peak of the last sunspot cycle, I regularly heard stations on 27.360 LSB, 27.370 LSB, 27.380 LSB, 27.390 LSB and 27.400 LSB (in addition to the usual 27.385 LSB and other nearby legal channels).  2 kHz isn't enough.  Sounds like they did it more to create chaos on 38LSB vs. actually to have a clear frequency.  If they can all move down to 27383 LSB, they can almost certainly move down to 27380 LSB (or up to 27390 LSB). 

Whatever happened to folks just switching to the other sideband?  Every radio that has LSB mode also has USB mode. 

41
10/11 meters / Re: 11m Band Activity 0942 21 DEC 2022
« on: December 21, 2022, 1834 UTC »
1830 UTC

Latin American stations coming in nicely now, especially in the legal 40 CB channels.

Lots of US stations as well.  Noted some odd data bursts on 27.195 MHz (not the usual MFSK signal that comes in when the band is open to Latin America).  Lots of data on 27.255 MHz.  Signals on all 40 of the legal channels. 

42
List of data and pager frequencies 25-30 MHz European paging frequencies POCSAG frequencies POCSAG frequency list 27 MHz pager frequency list 27 MHz data bursts list UNID data signals on 27 MHz FSK signals data bursts CB radio 11 meter paging frequencies POCSAG frequencies what are the CB frequencies CB channel frequencies chart freeband frequencies 11 meter frequencies list CB radio band plans data links 27 MHz RCRS 26.995 27.045 27.095 27.145 27.195 27.255 SRD LPD 26,995 27,045 27,095 27,145 27,195 27,255 transmitter 26-28 MHz RCRS frequencies 25-30 MHz frequencies allocations European CB channels EU CB channels UK CB channels Ireland CB radio USA FCC FM CB radio 80 channel 120 channel 240 channel

Checking a few European and Eastern European SDRs this morning

26150 FM 26.150 MHz FM - Pager paging signals - POCSAG 26,150 - UK hospital pagers
26150 FM 26.150 MHz FM - Pager paging signals - POCSAG 26,150 - Europe paging systems 26 MHz band
26200 FM 26.200 MHz FM - Pager paging signals - POCSAG 26,200 - European and UK paging systems
26225 FM 26.225 MHz - Begin harmonized - standardized - European 26 MHz paging band 26 MHz pager band (end: 26.935 MHz 26,935 MHz 26935 kHz)
26225 FM 26.225 MHz FM - POCSAG signals - mainland Europe
26250 FM 26.250 MHz FM - Pager paging signals - POCSAG 26,250 - European and UK paging systems
26300 FM 26.300 MHz FM - Pager paging signals - POCSAG 26,300 - European and UK paging systems
26350 FM 26.350 MHz FM - Pager paging signals - POCSAG 26,350 - European and UK paging systems
26400 FM 26.400 MHz FM - Pager paging signals - POCSAG 26,400 - European and UK paging systems
26450 FM 26.450 MHz FM - Pager paging signals - POCSAG 26,450 - European and UK paging systems
26500 FM 26.500 MHz FM - Pager paging signals - POCSAG 26,500 - European and UK paging systems
26550 FM 26.550 MHz FM - Pager paging signals - POCSAG 26,550 - European and UK paging systems
26600 FM 26.600 MHz FM - Pager paging signals - POCSAG 26,600 - European and UK paging systems
26610 FM 26.610 MHz FM - FSK data link signal noted during European band openings 26,610 26.61 MHz
26630 FM 26.630 MHz FM - POCSAG signals, heard during band opening to Europe 26,630 26.63 MHz
26635 FM 26.635 MHz FM - UK hospital paging systems POCSAG 26,635
26650 FM 26.650 MHz FM - Pager paging signals - POCSAG 26,650 - Europe
26695 FM 26.695 MHz FM - UK hospital paging systems POCSAG 26,695 (confirmed use)
26695 FM 26.695 MHz FM - Pager paging signals - POCSAG 26,695 - Europe
26700 FM 26.700 MHz FM - UK hospital paging systems POCSAG 26,700 (confirmed use)
26705 FM 26.705 MHz FM - UK hospital paging systems POCSAG 26,705 (confirmed use)
26745 FM 26.745 MHz FM - UK hospital paging systems POCSAG 26,745 (confirmed use)
26745 FM 26.745 MHz FM - Pager paging signals - POCSAG 26,745 - Europe
26750 FM 26.750 MHz FM - Pager paging signals - POCSAG 26,750 - Europe pagers 26MHz band
26755 FM 26.755 MHz FM - Pager paging signals - POCSAG 26.755 - European pagers, UK paging systems
26800 FM 26.800 MHz FM - Pager paging signals - POCSAG 26,800 - European pagers on 26 MHz
26850 FM 26.850 MHz FM - Pager paging signals - POCSAG 26,850 - Europe and UK (confirmed use)
26855 FM 26.855 MHz FM - Pager paging signals - POCSAG 26,855 - Europe and UK (confirmed use, offset frequency)
26865 FM 26.865 MHz FM - Pager paging signals - POCSAG 26,865 - Europe and UK
26900 FM 26.900 MHz FM - FSK data link (4-5 kHz wide) - Eastern or Central Europe
26900 FM 26.900 MHz FM - Pager paging signals - POCSAG 26,900 - Europe and UK (confirmed use)
26935 FM 26.935 MHz FM - Pager paging signals - POCSAG 26,935 - European paging frequency 26MHz pager
26935 FM 26.935 MHz - End harmonized - standardized - European 26 MHz paging band 26 MHz pager band (start: 26.225 MHz 26,225 MHz 26225 kHz)
26945 FM 26.945 MHz FM - FSK data bursts and MFSK data signal signals - verified 2 watt power data link systems in Russia
26950 FM 26.950 MHz FM - FSK data signals, similar to those usually heard on 27.255, etc.
26950 FM 26.950 MHz FM - Pager paging signals - POCSAG 26,950 - basically constant signal, European paging frequency
26950 FM 26.950 MHz FM - FSK data bursts with idle signals, Central European paging system 26,950 MHz 26.95 MHz
26950 FM 26.950 MHz FM - Pager bursts 26950 kHz 26,950 pager 26950 paging POCSAG
26955 FM 26.955 MHz FM - Pager paging signals - POCSAG signals on 26,955 26955 kHz
26955 FM 26.955 MHz FM - Idle signal, FM carrier with POCSAG signal (narrow band, 5-6 kHz wide)
26955 FM 26.955 MHz FM - FSK data bursts, European origin - fixed/mobile and fixed allocation (worldwide)
26960 FM 26.960 MHz FM - FSK data bursts and MFSK data signal signals - verified 2 watt power data link systems in Russia
26960 FM 26.960 MHz - Begin 40 channel standard EU CB channels, USA CB radio channel allocation, 26.965 MHz - 27.405 MHz (26.960 - 27.410 band)
26985 FM 26.985 MHz - Center frequency for the 80 channel German CB band, CB Channel 3
26995 FM 26.995 MHz FM - Data, remote control RC telemetry use (worldwide) 26.995 data signal 26.995 SRD
26995 FM 26.995 MHz FM - Pager paging signals - non-standard paging modes
27000 FM 27.000 MHz FM - FSK and MFSK data signals, Eastern or Central Europe or Russia
27000 FM 27.000 MHz FM - Unknown data mode - heard on Eastern European receivers
27003 FM 27.003 MHz FM - POCSAG pager signals noted in Northern Europe, European origin (offset frequency)
27007 FM 27.007 MHz FM - POCSAG pager signals noted in Northern Europe, European origin (offset frequency)
27045 FM 27.045 MHz FM - Data, remote control RC telemetry use (worldwide) 27.045 data signal 27.045 SRD
27045 FM 27.045 MHz FM - Pager paging signals - non-standard paging modes
27095 FM 27.095 MHz FM - Data, remote control RC telemetry use (worldwide) 27,095 data signal 27.095 SRD
27095 FM 27.095 MHz FM - Pager paging signals - non-standard paging modes
27100 FM 27.100 MHz FM - Pager paging signals - POCSAG 27,100 Europe / Eastern Europe
27120 FM 27.120 MHz - ISM allocation center frequency worldwide 27.12 MHz 27,12 ISM 27120 kHz 27,120 ISM (26957 - 27283 band)
27120 FM 27.120 MHz - Part 15 27MHz allocation center frequency (26960 - 27280 band)
27120 FM 27.120 MHz FM - Pager paging signals - POCSAG 27,120 Russia and Eastern Europe?
27120 FM 27.120 MHz FM - MFSK and FSK data link systems, heard on Eastern European receivers
27121 FM 27.121 MHz FM - Pager paging signals - POCSAG 27,121 Russia and Eastern Europe? (offset frequency)
27140 FM 27.140 MHz FM - FSK and MFSK data signals, monitored on Eastern European receivers
27145 FM 27.145 MHz FM - Data, remote control RC telemetry use (worldwide) 27,145 data signal 27.145 SRD
27145 FM 27.145 MHz FM - Pager paging signals - non-standard paging modes
27150 FM 27.150 MHz FM - Pager paging signals - POCSAG 27,150 Europe / Eastern Europe
27185 FM 27.185 MHz - Center frequency for the regular 40 channel EU CB band/USA FCC CB band, CB Channel 19
27195 FM 27.195 MHz FM - Data, remote control RC telemetry use (worldwide) 27,195 data signal 27.195 SRD
27195 FM 27.195 MHz FM - Pager paging signals - non-standard paging modes
27197 FM 27.197 MHz FM - FSK data link, data bursts 27.197 27,197 (within the 27,190 to 27,200 SRD "band")
27200 FM 27.200 MHz FM - Pager paging signals - POCSAG 27,200 Europe / Eastern Europe
27230 FM 27.230 MHz FM - Data modes (CB radio), paging and data link systems (Europe)
27235 FM 27.235 MHz FM - Data modes (CB radio), paging and data link systems (Europe)
27240 FM 27.240 MHz FM - Data modes (CB radio), paging and data link systems (Europe)
27245 FM 27.245 MHz FM - Data modes (CB radio), paging and data link systems (Europe)
27250 FM 27.250 MHz FM - Pager paging signals - POCSAG 27,250 Europe / Eastern Europe
27255 FM 27.255 MHz FM - Data, remote control RC telemetry use (worldwide) 27,255 data signal 27.255 SRD
27255 FM 27.255 MHz FM - Pager paging signals - non-standard paging modes
27270 FM 27.270 MHz - Actual 11 meter center frequency, 27.272 MHz, CB channel 27 is closest, 27.275 MHz
27300 FM 27.300 MHz FM - Pager paging signals - POCSAG 27,300 Europe / Eastern Europe
27350 FM 27.350 MHz FM - Pager paging signals - POCSAG 27,350 Europe / Eastern Europe
27360 FM 27.360 MHz FM - Pager paging signals - POCSAG 27,360 Europe / Eastern Europe
27410 FM 27.410 MHz - End 40 channel standard EU CB channels, USA CB radio channel allocation, 26.965 MHz - 27.405 MHz (26.960 - 27.410 band)
27450 FM 27.450 MHz FM - Pager (POCSAG) with FM carrier during idle time - good band opening indicator to Nordic countries
27500 FM 27.500 MHz FM - Pager paging signals - POCSAG (lots of SSB activity on/around this frequency)
27505 FM 27.505 MHz FM - MFSK data signal - similar to the signal often heard on 27.195 during band openings to Latin America
27510 FM 27.510 MHz FM - Pager paging signals - POCSAG, mixing with MFSK data signals
27512 FM 27.512 MHz FM - Pager paging signals - POCSAG 27.5125 MHz - Eastern Europe
27513 FM 27.513 MHz FM - Pager paging signals - POCSAG 27.5125 MHz - Eastern Europe
27515 FM 27.515 MHz FM - Pager paging signals - POCSAG 27,515 (see also: 27.510 MHz, 27.512 MHz)
27545 FM 27.545 MHz FM - Confirmed European RC and data link frequency 27,545
27550 FM 27.550 MHz FM - Pager paging signals - POCSAG 27,550
27575 FM 27.575 MHz FM - FSK data bursts, Eastern Europe 27,575
27585 FM 27.585 MHz FM - FSK data bursts, Eastern Europe 27,585
27600 FM 27.600 MHz - Begin UK FM CB band and Irish parish radio CADS WPAS band (27.60125 - 27.99125 band overlaid with 27.605 MHz - 27.995 MHz band)
27600 FM 27.600 MHz FM - Pager paging signals - POCSAG 27,600
27615 FM 27.615 MHz FM - Confirmed European RC and data link frequency 27,615
27635 FM 27.635 MHz FM - Confirmed European RC and data link frequency 27,635
27650 FM 27.650 MHz FM - Pager paging signals - POCSAG 27,650
27675 FM 27.675 MHz FM - Confirmed European RC and data link frequency 27,675
27700 FM 27.700 MHz FM - Pager paging signals - POCSAG 27,700
27725 FM 27.725 MHz FM - Confirmed European RC and data link frequency 27,725
27750 FM 27.750 MHz FM - Pager paging signals - POCSAG 27,750 - Central Europe
27775 FM 27.775 MHz FM - Confirmed European RC and data link frequency 27,775
27800 FM 27.800 MHz FM - Pager paging signals - POCSAG 27,800 - Europe
27845 FM 27.845 MHz FM - Pager paging signals - POCSAG 27,845
27847 FM 27.847 MHz FM - Pager paging signals - POCSAG 27,847 offset frequency
27848 FM 27.848 MHz FM - Pager paging signals - POCSAG 27,848 offset frequency
27850 FM 27.850 MHz FM - Pager paging signals - POCSAG 27,850
27885 FM 27.885 MHz FM - MFSK FSK data bursts, telemetry network or data network - or non-standard paging system
27900 FM 27.900 MHz FM - Pager paging signals - POCSAG 27,900 - Europe
27950 FM 27.950 MHz FM - Pager paging signals - POCSAG 27,950 - Europe
27995 FM 27.995 MHz - End UK FM CB band and Irish parish radio CADS WPAS band (27.60125 - 27.99125 band overlaid with 27.605 MHz - 27.995 MHz band)


29725 FM 29.725 MHz FM - FSK and MFSK signals noted on this frequency during band openings
29750 FM 29.750 MHz FM - Pager paging signals - POCSAG 29,750 - Central Europe - Eastern Europe
29770 FM 29.770 MHz FM - FSK data link signals - European origin?
29800 FM 29.800 MHz FM - Pager paging signals - POCSAG 29,800 - Central Europe - Eastern Europe
29810 FM 29.810 MHz FM - UNID FSK data bursts, Northern Europe?  (unconfirmed)
29840 FM 29.840 MHz FM - FSK data link signals, Europe or Russia (unknown source)
29850 FM 29.850 MHz FM - Pager paging signals - POCSAG 29,850 - Central Europe - Eastern Europe
29900 FM 29.900 MHz FM - Pager paging signals - POCSAG 29,900 - Central Europe - Eastern Europe
29905 FM 29.905 MHz FM - FSK data link data bursts - Eastern Europe
29925 FM 29.925 MHz FM - Pager paging signals - POCSAG 29,925 - European origin (unconfirmed)
29950 FM 29.950 MHz FM - Pager paging signals - POCSAG 29,950 - Central Europe - Eastern Europe
30000 FM 30.000 MHz FM - Pager paging signals - POCSAG 30,000 - Unknown source (heard during band opening
30020 FM 30.020 MHz FM - POCSAG pagers, Canada hospital paging Canadian hospitals (confirmed)
30020 FM 30.020 MHz FM - POCSAG signals - heard during European band opening as well
30025 FM 30.025 MHz FM - POCSAG pager signal - European origin?  Unconfirmed
31325 FM 31.325 MHz FM - UNID data mode (roughly 10 kHz wide), not POCSAG
31725 FM 31.725 MHz FM - UK hospital paging systems - POCSAG - confirmed use 31,725 pager
31750 FM 31.750 MHz FM - UK hospital paging systems - POCSAG - confirmed use 31,750 pager
31775 FM 31.775 MHz FM - UK hospital paging systems - POCSAG - confirmed use 31,775 pager

43
10/11 meters / Re: 11m Band Activity 0942 21 DEC 2022
« on: December 21, 2022, 1148 UTC »

Still early here on the US East Coast (0645 local time, 1145 UTC).

Noting FSK data bursts on 27.255 MHz (not local) - on my local receivers.  The usual suspects (27025 AM, 27065 AM, 27085 AM, 27185 AM, 27265 AM, 27285 AM, 27385 LSB, etc.) are waking up. 


44
10/11 meters / Re: 11m Band Activity 20 DEC 2022
« on: December 20, 2022, 1603 UTC »
Now (1600 UTC),

The UK paging frequencies (26.695 MHz, 26.745 MHz, and a couple others) are still coming in, but not nearly as strongly as before.  Noting more data signals on the legal data/RC "Class C" (Part 95C of the FCC rules) frequencies 26995, 27045, 27095, 27145 and especially 27195 and 27255.  Some FM voice on 27275 and 27125, but mostly AM.

Latin American DX now coming in nicely, taxi dispatcher on 26.765 AM is very loud, hearing more Spanish language chatter across the band, including on 26.935 AM and 26.945 AM.  Taxi dispatcher on 26.905 MHz AM mixing in with other stations. 

I stand corrected:  UK FM signals still coming in on

27781 FM - UK FM CB Channel 19 - 27.781.25 MHz FM
27871 FM - UK FM CB Channel 28 - 27.871.25 MHz FM
27891 FM - UK FM CB Channel 30 - 27.891.25 MHz FM
27941 FM - UK FM CB Channel 35 - 27.941.25 MHz FM
27961 FM - UK FM CB Channel 37 - 27.961.25 MHz FM
27971 FM - UK FM CB Channel 38 - 27.971.25 MHz FM

Also a fair amount of SSB activity within the 27.6 MHz to 28.0 MHz portion (which is where the UK FM 27/81 band is), including on 27845 LSB, 27855 USB and several others.  Taxi cab dispatchers active there as well as the usual Spanish and Portuguese language SSB

45
As a follow up to this - the band is open again today, and I'm hearing faint POCSAG signals on 31.7250, 31.7500 and 31.7750...fading up out of the noise a tiny bit right now (1530 UTC) on 20 December 2022.

The 11m band is wide open the Europe, the UK and Latin America right now so it makes sense. 

Pages: 1 2 [3] 4 5 6 7 8 9 10 11 ... 189

Item image   Lana Grossa Yarn 100g Color 1004 Free Shipping!

 $17.95