Messages

91

10/11 meters / FM CB Activity - 26.805 MHz FM and 26.795 MHz FM 2000 UTC 26 Dec 2023

« on: December 26, 2023, 2002 UTC »

Lots of activity on the FM calling frequency 26.805MHz FM 26805 kHz FM.  Noted almost as much on 26.795 MHz as well.  Heard "187 Northern California" working a 10 division station (Mexico) on 26.805 MHz FM with almost full quieting signals, very nice audio from both stations.   A third station keyed over the Mexican DXer but thanks to capture effect...it made almost no difference. 

26.795 MHz is a good alternate for the 26.805 FM frequency.   It is usually much quieter than, say, 26.815 MHz or 26.825 MHz.

92

10/11 meters / Russian Taxi Cab Comms Land Mobile Radio 25-30 MHz [G8JNJ SDR] 26 Dec 2023

« on: December 26, 2023, 1500 UTC »

11 Meter Band Activity 26 MHz Band 28 MHz Russian taxis 25.615 MHz - 30.105 MHz 26.060 MHz 27.995 MHz 26-28 MHz.  Russian YL dispatcher Russia CIS 50 division frequencies radio taxi Olga taxi dispatch lady reading addresses CB radio interference 28MHz band 29MHz 27MHz CB band 25MHz 26-28 MHz CB radio bands

Russian taxi cab radio dispatch YL dispatcher Russian PMR LMR land mobile comms logged on the following frequencies

25.615 MHz - Begin Export Radio Band A Channel 1 - to 28.305 MHz / 28.310 MHz / 28.315 MHz or 30.105 MHz most radios cover 25.615-30.105

25.655 MHz FM
25.695 MHz FM
25.755 MHz FM
25.775 MHz FM - heavy QRM from 25775 LSB SSB free band CB chatter
25.835 MHz FM
25.850 MHz FM 
25.865 MHz FM
25.895 MHz FM
25.945 MHz FM
25.955 MHz FM
25.965 MHz FM - some QRM from 25.965MHz LSB Spanish language freeband CB radio
25.975 MHz FM
26.005 MHz FM
26.025 MHz FM
26.045 MHz FM
26.050 MHz FM
26.055 MHz FM
26.060 MHz - Russian CB Radio Channel A01R or A01P - 5 kHz steps / 10 kHz steps to 27.995 MHz
26.065 MHz FM
26.070 MHz FM
26.075 MHz FM
26.085 MHz FM
26.095 MHz FM
26.115 MHz FM
26.125 MHz FM - with FSK data signal causing pretty bad QRM at points
26.135 MHz FM
26.165 MHz FM
26.175 MHz FM
26.185 MHz FM
26.195 MHz FM - paging signals on 26.200 MHz 26.2MHz pagers heavy POCSAG interference
26.220 MHz FM
26.225 MHz FM
26.240 MHz FM
26.255 MHz FM
26.260 MHz FM
26.265 MHz FM
26.275 MHz FM
26.305 MHz FM
26.335 MHz FM - some QRM from AM voice comms on same frequency
26.375 MHz FM
26.485 MHz FM
26.500 MHz - Russian CB Radio Channel A40R / A40P
26.500 MHz FM
26.505 MHz - Russian CB Radio Channel A40E / Export Radio Channel Plan Band B Channel 40
26.505 MHz FM
26.510 MHz - Russian CB Radio Channel B01R / B01P
26.510 MHz FM
26.515 MHz - Export Radio Band C Channel 1
26.515 MHz - Russian CB Radio Channel B01E Band B Channel 1 European Plan or "Fives"
26.525 MHz FM
26.575 MHz FM - significant interference from freeband CB radio signals (AM mode)
26.590 MHz FM
26.600 MHz FM - active POCSAG paging on same frequency
26.615 MHz FM
26.620 MHz FM
26.625 MHz FM
26.630 MHz FM
26.635 MHz FM
26.645 MHz FM
26.650 MHz FM
26.665 MHz FM
26.670 MHz FM
26.675 MHz FM
26.680 MHz FM
26.685 MHz FM
26.690 MHz FM - some interference from POCSAG paging signals on 26.695 MHz
26.700 MHz FM - some interference from POCSAG paging signals on 26.700 MHz, 26.695 MHz and 26.705 MHz
26.705 MHz FM - pager signal QRM
26.715 MHz FM
26.725 MHz FM
26.730 MHz FM
26.735 MHz FM - some interference from German FM CB and US truckers using export radios
26.740 MHz FM
26.755 MHz FM
26.765 MHz FM - the Mexican taxi cab dispatcher is not yet coming in on this frequency
26.775 MHz FM
26.780 MHz FM
26.795 MHz FM
26.800 MHz FM
26.805 MHz FM including off-frequency 26.80625 MHz 26806.25 kHz 26.806 MHz
26.810 MHz FM
26.825 MHz FM
26.855 MHz FM
26.860 MHz FM
26.865 MHz FM
26.875 MHz FM
26.895 MHz FM - with pretty substantial QRM from pager operating on 26900 kHz 26.900 MHz 26.9 MHz
26.925 MHz FM
26.950 MHz FM
26.955 MHz - Export Radio Band C Channel 40
26.960 MHz - Russian CB Radio Channel C01P / C01R or just Channel 1R
26.960 MHz - Polish CB Radio Channel 1
26.960 MHz FM - very severe interference from non-stop data signals on frequency 26960 / 26,960 - CB Channel 1R
26.965 MHz - Standard EU / CE / CEPT mid band CB Radio Channel 1
26.965 MHz - US CB Radio FCC CB Channel 1
26.965 MHz - Export Radio Band D Channel 1
26.965 MHz - Russian CB Radio Channel C01E or Channel 1E
26.975 MHz FM - CB Channel 2 FM
26.985 MHz FM - Simplex Repeater - CB Channel 3 FM
26.995 MHz FM - Russian taxis with heavy QRM from data on 26.995MHz RCRS
27.010 MHz FM - CB Channel 5R
27.035 MHz FM - Simplex Repeater mixing with Russian taxi cab dispatch - CB Channel 7
27.050 MHz FM - Repeater - CB Channel 8R
27.055 MHz FM - CB Simplex Repeater - CB Channel 8
27.065 MHz FM Russian taxi, heavy QRM from 27.065 MHz FM
27.070 MHz FM Repeater - CB Radio Repeater Channel 10R
27.080 MHz FM Repeater - CB Radio Repeater Channel 11R
27.100 MHz FM Repeater - Krasnodar Russia CB Radio Repeater 27100 FM Channel 12R
27.120 MHz FM - Russian taxi
27.125 MHz FM - Russian, heavy QRM
27.180 MHz FM - Russian QSOs
27.200 MHz FM - Russian
27.205 MHz FM - Russian, also Repeater on 27.205MHz FM
27.250 MHz FM - CB Channel 23R
27.255 MHz FM - CB Channel 23
27.260 MHz FM - CB Channel 26R
27.265 MHz FM Russian taxi, QRM from US stations running AM
27.300 MHz FM Russian taxi, heavy POCSAG paging QRM CB Radio Channel 30R
27.330 MHz FM Russian taxi - CB Channel 33R
27.340 MHz FM - Russian taxi cab radio comms - CB Channel 34R
27.345 MHz FM Russian, heavy SSB QRM
27.360 MHz FM - Russian taxi cab radio comms, POCSAG paging on same frequency - CB Channel 36R
27.400 MHz - Russian CB Radio Channel C40P / C40R or just Channel 40R or 40P
27.400 MHz - Polish CB Radio Channel 40
27.405 MHz - Standard EU / CE / CEPT mid band CB Radio Channel 40
27.405 MHz - US CB Radio FCC CB Channel 40
27.405 MHz - Export Radio Band D Channel 40
27.405 MHz - Russian CB Radio Channel C40E or Channel 40E
27.410 MHz - Russian CB Radio Channel D01P / D01P
27.415 MHz - Export Radio Band E Channel 1
27.415 MHz - Russian CB Radio Channel D01E
27.415 MHz FM
27.420 MHz FM
27.440 MHz FM
27.445 MHz FM - with heavy QRM from paging signals on 27.450 MHz
27.490 MHz FM
27.510 MHz FM - strong QRM from POCSAG pager signals on / near 27.500 MHz / 27.505 MHz
27.575 MHz FM - severe SSB free
27.585 MHz FM
27.601 MHz - UK FM CB Radio Channel 1 - frequency 27.60125 MHz FM - 10 kHz steps to 27.99125 MHz FM
27.601 MHz - CADS / WPAS Channel LW01 - 10kHz steps to 27.991 MHz, AM or FM mode - matches UK FM 27/81 band plan
27.605 MHz - CADS / WPAS Channel UW01 - 10 kHz steps to 27.995 MHz, AM or FM mode
27.650 MHz FM - UK FM CB Channel 6 - 27.651 MHz FM and SSB freeband CBer interference
27.675 MHz FM
27.685 MHz FM
27.725 MHz FM
27.735 MHz FM
27.745 MHz FM
27.750 MHz FM
27.755 MHz FM
27.760 MHz FM - POCSAG paging and MFSK data link on same frequency
27.765 MHz FM
27.775 MHz FM
27.795 MHz FM
27.800 MHz FM
27.805 MHz FM
27.815 MHz FM
27.825 MHz FM
27.845 MHz FM
27.855 MHz FM with heavy QRM from 27.855 MHz AM
27.865 MHz FM
27.875 MHz FM
27.890 MHz FM - right next to strong data / paging signal on 27.885MHz, UK FM CB 27.891 FM
27.895 MHz FM
27.905 MHz FM - causing severe interference to UK FM CB 27.901 FM and 27.911 FM
27.915 MHz FM - see above re: Russian taxi interference CB radio
27.925 MHz FM
27.935 MHz FM - very strong POCSAG pager and data link on 27.94 MHz
27.945 MHz FM
27.950 MHz FM - POCSAG paging QRM, UK FM CB 27.951 FM 27.95125 MHz FM
27.955 MHz FM
27.965 MHz FM - some QRM from UK FM CB 27.96125 FM and 27.97125 MHz FM
27.975 MHz FM
27.985 MHz FM
27.995 MHz FM - with QRM from 27.995 MHz LSB freebanders, 27.99125 FM UK FM CB CH40
28.000 MHz - Begin 10 meter amateur radio 28MHz band allocation to 29.7MHz
28.045 MHz FM
28.055 MHz FM
28.060 MHz FM
28.095 MHz FM
28.115 MHz FM - very strong
28.125 MHz FM
28.135 MHz FM
28.145 MHz FM - Very busy
28.155 MHz FM
28.165 MHz FM
28.175 MHz FM
28.195 MHz FM
28.210 MHz FM
28.215 MHz FM
28.225 MHz FM
28.245 MHz FM
28.250 MHz FM
28.255 MHz FM
28.265 MHz FM
28.275 MHz FM
28.285 MHz FM
28.300 MHz FM
28.305 MHz FM
28.310 MHz FM
28.315 MHz FM
28.325 MHz FM
28.355 MHz FM
28.425 MHz FM
28.875 MHz FM
28.885 MHz FM
28.975 MHz FM
29.700 MHz - End 10 meter amateur band 28MHz ham radio band
29.805 MHz FM
29.825 MHz FM
29.855 MHz FM
29.885 MHz FM
29.905 MHz FM
29.965 MHz FM

93

10/11 meters / Re: 27.100 MHz FM Simplex Repeater Krasnodar Russia - Active 22 December 2023

« on: December 26, 2023, 1236 UTC »

Tuned in via several SDRs on mainland Europe and in the UK.  27.100 MHz FM repeater is being keyed up nearly constantly by on-channel and adjacent-channel signals.  Lots of Russian, Polish and other languages mixing in.  Russian taxi cabs all over the band.  Also, data signals on the 26.945 MHz and 26.960 MHz frequencies (2 watt data links) as well as the 27.505 MHz POCSAG paging frequency and others. 

94

10/11 meters / Russian Taxi Cab Comms Land Mobile Radio 25-30 MHz [G8JNJ SDR] 22 Dec 2023

« on: December 22, 2023, 1334 UTC »

Russian taxi cab radio chatter logs - YL dispatcher Olga Russian Taxi Controllers Russian PMR LMR land mobile radio comms VHF low band 11m band 27MHz CB band


25.615 MHz FM
25.650 MHz FM
25.665 MHz FM
25.675 MHz FM
25.705 MHz FM
25.725 MHz FM
25.765 MHz FM
25.770 MHz FM
25.775 MHz FM
25.845 MHz FM
25.875 MHz FM
25.925 MHz FM
25.945 MHz FM
25.955 MHz FM
25.965 MHz FM
25.975 MHz FM
26.000 MHz FM
26.025 MHz FM
26.045 MHz FM
26.050 MHz FM
26.060 MHz FM
26.065 MHz FM
26.085 MHz FM
26.105 MHz FM
26.115 MHz FM
26.125 MHz FM
26.145 MHz FM
26.155 MHz FM
26.175 MHz FM
26.185 MHz FM
26.195 MHz FM
26.205 MHz FM
26.260 MHz FM
26.275 MHz FM
26.285 MHz FM
26.335 MHz FM
26.365 MHz FM
26.375 MHz FM
26.485 MHz FM
26.495 MHz FM
26.505 MHz FM
26.525 MHz FM
26.560 MHz FM
26.600 MHz FM
26.605 MHz FM
26.620 MHz FM
26.625 MHz FM
26.630 MHz FM
26.645 MHz FM
26.650 MHz FM
26.670 MHz FM
26.675 MHz FM
26.680 MHz FM
26.700 MHz FM
26.725 MHz FM
26.750 MHz FM
26.760 MHz FM
26.765 MHz FM - with QRM from taxi cab dispatcher on same frequency using AM mode 26.765 MHz AM
26.770 MHz FM
26.775 MHz FM
26.780 MHz FM
26.825 MHz FM
26.855 MHz FM
26.900 MHz FM - with very heavy QRM from paging/data POCSAG on 26.9 MHz
26.950 MHz FM - with very heavy QRM from paging and data on 26.950 MHz, 26.945 MHz and 26.955 MHz
26.980 MHz FM
27.005 MHz FM
27.040 MHz FM
27.050 MHz FM
27.055 MHz FM
27.120 MHz FM
27.170 MHz FM - with heavy QRM from 27.170 MHz USB SSB chatter
27.200 MHz FM - extreme QRM from 27.200 MHz and 27.205 MHz
27.255 MHz FM - noted heavy QRM from voice and RCRS data signals on 27.255MHz
27.270 MHz FM
27.330 MHz FM
27.350 MHz FM
27.400 MHz FM - severe QRM from SSB CB signals on/near the frequency
27.410 MHz FM
27.415 MHz FM
27.420 MHz FM
27.430 MHz FM
27.440 MHz FM
27.490 MHz FM
27.500 MHz FM
27.510 MHz FM
27.540 MHz FM
27.575 MHz FM
27.580 MHz FM
27.585 MHz FM
27.625 MHz FM
27.645 MHz FM
27.650 MHz FM
27.675 MHz FM
27.705 MHz FM
27.715 MHz FM
27.720 MHz FM - heavy QRM from UK FM CB comms and SSB freeband CB signals
27.725 MHz FM
27.735 MHz FM
27.745 MHz FM
27.750 MHz FM - POCSAG pager also active on this frequency
27.755 MHz FM
27.765 MHz FM
27.775 MHz FM - causing severe QRM with UK FM CB Channel 19 - 27.78125 MHz FM
27.795 MHz FM
27.805 MHz FM
27.815 MHz FM
27.825 MHz FM
27.835 MHz FM
27.845 MHz FM - severe QRM from POCSAG paging system on 27.848 MHz
27.850 MHz FM - severe QRM from POCSAG pager signals on 27.848 MHz and UK FM CB chatter on 27.851 FM
27.855 MHz FM - with very strong QRM from freebanders on 27.855 MHz AM
27.865 MHz FM
27.875 MHz FM
27.885 MHz FM
27.895 MHz FM
27.900 MHz FM
27.905 MHz FM
27.915 MHz FM
27.925 MHz FM
27.935 MHz FM
27.945 MHz FM
27.950 MHz FM
27.955 MHz FM
27.965 MHz FM
27.975 MHz FM
27.985 MHz FM
27.995 MHz FM
28.005 MHz FM - severe QRM from 10m CW signals
28.050 MHz FM
28.055 MHz FM
28.100 MHz FM
28.105 MHz FM
28.115 MHz FM
28.125 MHz FM
28.145 MHz FM
28.155 MHz FM
28.175 MHz FM
28.195 MHz FM
28.205 MHz FM
28.210 MHz FM
28.215 MHz FM
28.225 MHz FM
28.245 MHz FM
28.260 MHz FM
28.265 MHz FM
28.275 MHz FM
28.300 MHz FM
28.305 MHz FM
28.310 MHz FM
28.315 MHz FM
28.325 MHz FM
28.335 MHz FM
28.355 MHz FM
28.375 MHz FM
28.585 MHz FM
29.745 MHz FM
29.805 MHz FM
29.815 MHz FM
29.855 MHz FM
29.885 MHz FM
29.905 MHz FM
29.915 MHz FM
29.945 MHz FM
29.955 MHz FM
29.965 MHz FM

95

10/11 meters / 27.420 MHz FM 27420 kHz FM - Russian Taxi Cab Dispatch [G8JNJ SDR] 22 Dec 2023

« on: December 22, 2023, 1313 UTC »

Lots of Russian comms coming in this morning on the G8JNJ SDR.  Noted taxi cab land mobile radio dispatch on

27.420 MHz FM - strong YL dispatcher getting obliterated by SSB QRM




27170 kHz USB 27.170 MHz USB
27180 kHz USB 27.180 MHz USB
27190 kHz USB 27.190 MHz USB
27200 kHz USB 27.200 MHz USB - with very heavy QRM from 27.200 MHz FM, 27.205 MHz FM and 27.205 MHz FM, including a repeater on 27.205 MHz FM - CB Radio Channel 20 FM

96

10/11 meters / 27.100 MHz FM Simplex Repeater Krasnodar Russia - Active 22 December 2023

« on: December 22, 2023, 1304 UTC »

27100 FM getting almost constantly keyed up.  Lots of activity on 11m, every 5 kHz.

97

Peskies / Russian Language 2-4 MHz AM Mode "Troika" - Around 3 MHz 0300 UTC 22 Dec 2023

« on: December 22, 2023, 0329 UTC »

Via G8JNJ SDR.


3000 kHz AM - note: significant QRM from Russian comms on 3003 kHz USB - 3002.3 kHz, 3002.5 kHz, 2999.9 kHz, 2998 kHz, 3001 kHz
3030 kHz AM or 3035 kHz AM?  3033 kHz, 3033.3 kHz, 3033.5 kHz, 3033.8 kHz, 3034.1 kHz
3060 kHz AM - 3058 kHz maybe - 3058.1 kHz, 3057 kHz, 3057.5 kHz, 3058.8 kHz, 3059.5 kHz
3120 kHz AM - stations on: 3119.5 kHz, 3118.6 kHz , 3121.6 kHz
3150 kHz AM - very busy - stations on frequency: 3149.2 kHz 3150.0 kHz, 3151.9 kHz, 3152.1 kHz, 3153.3 kHz
3170 kHz AM - 3172.0 kHz, 3169.0 kHz, 3171.1 kHz

3.000 MHz 3.003 MHz 2.999 MHz, 3.001 MHz
3.030 MHz AM w/QRM from Russian two way comms on 3003 kHz USB 3.003 MHz USB
3.170 MHz
3.

98

10/11 meters / Re: World Radio 5033 11m SSTV images 2140 UTC 20 DEC 2023

« on: December 21, 2023, 2259 UTC »

I've actually come across several voice (AM, FM and SSB) users of 27.7 MHz and nearby frequencies.

Yes, there is at least one Russian taxi cab company that uses 27.700 MHz FM for taxi cab dispatch.  27.70125 MHz FM is UK CB FM Channel 11.  Plus there's at a handful of different paging and data link systems operating on 27.7000 MHz too.

Finland has a 5 watt on-site pager and telemetry data link service on:

27.7 MHz
27.72 MHz
27.74 MHz
27.76 MHz
27.78 MHz
27.8 MHz
27.82 MHz
27.84 MHz
27.86 MHz
27.88 MHz
27.90 MHz
27.92 MHz
27.94 MHz

Bandwidth is limited 10 kHz. 

Other unknown-source POCSAG paging signals noted on 27.700 MHz as well as the "usual suspects" - freeband 11 meter CB radio traffic, most of it in SSB mode on 27.695 MHz USB, 27.700 MHz LSB, 27.700 MHz USB, 27.705 MHz LSB, and of course, AM voice comms and FM voice comms on on 27.705 MHz and 27.695 MHz and Irish churches - Parish radio (CADS / WPAS) on 27.605 MHz - 27.995 MHz and 27.60125 MHz - 27.99125 MHz.  Most of the 27MHz band church broadcasts seem to be on the LW channel plan (which is identical to the UK FM CB radio band plan), with 27.70125 MHz - or 27.701 MHz being widely used. 

The UW channels are just 27.605 MHz - 27.995 MHz (10 kHz spacing) so 27.705 MHz and 27.695 MHz come into play here. 

Since many of these transmitters are easily 1-2 kHz off frequency, a transmitter operating on LW11 or 27.701.25 MHz or UW11, which is 27.705 MHz. being only a kHz or so off-frequency means havoc to SSTV, of course, it goes both ways. 

That, and our friends the Asian fishing fleets are active on 27.700 MHz FM [CSQ].  27.7 MHz is 480 channel FM fishery marine radio (27.5 MHz - 39.475 MHz) Channel 009.  While most of the fishery chatter I've heard has been above 29, 30 MHz, they are active below 28.000 MHz.

99

10/11 meters / 29.855 MHz FM Russian Land Mobile - Taxi Cab Radio Dispatch System

« on: December 21, 2023, 1352 UTC »

Good signals via G8JNJ SDR at 1345 UTC on 21 December 2023.  29.855 FM 29,855 NFM Taxis, Russia LMR 29.7-30 MHz 29.7-50 MHz VHF low band but still more or less “10 meters” - that little sliver of spectrum between 29.700 MHz and 30.000 MHz

Not sure if they’re using export radios or actual land mobile radios.  Nice 15-16 kHz wide FM. Most export radios / 10m radios that cover 25.615 MHz - 30.105 MHz are in NFM only - that is, 8K00F3E to 8K50F3E to 10K0F3E emission.

YL dispatcher and OM drivers.  Dispatch signals a solid SIO 444.   Another Russian taxi service land mobile radio LMR PMR system operating in the 25-30 MHz region.

29855 FM 29.8550 MHz FM 29.855MHz Taxicab Radio Dispatch

100

10/11 meters / Re: World Radio 5033 11m SSTV images 2140 UTC 20 DEC 2023

« on: December 21, 2023, 1129 UTC »

Very nice decodes.  27.700 MHz has been really active lately

101

10/11 meters / Finland 5 Watt Datalink Signals 27.760 MHz 27760 kHz - Late December 2023

« on: December 20, 2023, 1437 UTC »

10 kHz wide MFSK signal on 27.760 MHz, active at the same time 27.940 MHz was booming in - along with numerous other signals from that general area, including taxi cab radio communications (taxi controllers - YL taxi dispatchers "Olga") on 25 MHz, 26 MHz, 27 MHz, 28 MHz and VHF low band (37 MHz, 38 MHz, 41 MHz and 42 MHz - specifically 37.225 MHz, 38.375 MHz and 38.525 MHz) - see thread here: https://www.hfunderground.com/board/index.php/topic,122839.0.html


https://www.youtube.com/watch?v=g7gYZsoxX0Q

^ Video showing the signal on 27760 kHz 27.76MHz.  5 watt power output limit. 

Other frequencies - also 5w power limit:

26.965 MHz - also CB radio channel 1
27.002 MHz offset frequency
27.0025 MHz center frequency
27.003 MHz offset frequency
27.007 MHz offset frequency
27.0075 MHz center frequency
27.008 MHz offset frequency
27.075 MHz - also CB channel 10
27.080 MHz - halfway between CB radio channel 10 and CB radio channel 11
27.100 MHz - halfway between RCRS / data frequency 27.095 MHz and CB radio channel 12 - 27.105 MHz
27.200 MHz
27.255 MHz - shared with CB radio channel 23, used for high power paging and data worldwide
27.400 MHz
27.700 MHz
27.720 MHz
27.740 MHz
27.760 MHz
27.780 MHz
27.800 MHz
27.820 MHz
27.840 MHz
27.860 MHz
27.880 MHz
27.900 MHz
27.920 MHz
27.940 MHz
27.960 MHz
27.980 MHz

102

VHF/UHF Logs, including satellites and radiosondes / Re: 37.225 MHz FM Russian Taxi Cab Radio Taxi YL Dispatcher 19 December 2023

« on: December 20, 2023, 1241 UTC »

37.2250 MHz FM
38.3750 MHz FM
38.5250 MHz FM

all active with Russian radio taxi radio dispatch comms, 85.4 Hz tone squelch.  Russian PMR / LMR low band VHF 25-50 MHz

Other similar logs

37.125 MHz FM 77.0 Hz
37.225 MHz FM 85.4 Hz
37.225 MHz FM 100.0 Hz
37.375 MHz FM 100.0 Hz
37.400 MHz FM 167.9 Hz
37.425 MHz FM 114.8 Hz
38.275 MHz FM 94.8 Hz
38.275 MHz FM 97.4 Hz
38.375 MHz FM 85.4 Hz
38.525 MHz FM 85.4 Hz
38.525 MHz FM 100.0 Hz
38.575 MHz FM 100.0 Hz
38.725 MHz FM 156.7 Hz
41.300 MHz FM 100.0 Hz
41.525 MHz FM 179.9 Hz
41.800 MHz FM 100.0 Hz
41.800 MHz FM 173.8 Hz
41.800 MHz FM 179.9 Hz
42.200 MHz FM 110.9 Hz
42.425 MHz FM 100.0 Hz
42.425 MHz FM 179.9 Hz
42.675 MHz FM 162.2 Hz

Like the 38.375 MHz, 38.525 MHz 38.575 MHz frequencies, 41.3 MHz FM and 41.8 MHz FM both fall within military allocations, but they are using various PL tones - No doubt other tones are in use too, avoiding QRM from any military comms, local or due to skip.    12.5 kHz / 25 kHz spacing.

All appear to be Russian taxi cab radio comms - taxi controllers taxi cab dispatch voice traffic VHF low band 30-50 MHz 25-54 MHz 30-88 MHz 38MHz band 41 MHz band 42MHz band

29-36 MHz
35-50 MHz
37-50 MHz
42-50 MHz
36-42 MHz
33-48 MHz 48,5 MHz 33-48.5 MHz
57.0125 MHz 57.5 MHz

103

VHF/UHF Logs, including satellites and radiosondes / 37.225 MHz FM Russian Taxi Cab Radio Taxi YL Dispatcher 19 December 2023

« on: December 19, 2023, 1403 UTC »

Listening to 25-30 MHz and 30-50 MHz this morning on the G8JNJ “Flydog SDR”.  Lots of Russian LMR / PMR taxi cab comms on 26MHz, 27MHz, 28MHz and tons of out of band chatter all over the place.  Russians on 29.898 MHz USB (getting obliterated by POCSAG paging signals center on 29.900 MHz). 

37.225 MHz FM, with nice strong deviation 16 kHz bandwidth and very pronounced AC hum in the background, YL dispatcher Olga taxi controller 37,225 37.2250 MHz FM Russian Russia taxi cab radio comms VHF low.  The hum could also be a CTCSS tone in use, but it reminds me more of the 30-88 MHz military radio comms that have the tell-tale 400Hz aircraft power supply hum in the background. 

I know low band VHF radios like the Alinco DR-135LH cover 33 MHz - 48.5 MHz and 57.0125 MHz - 57.5 MHz, in regular wide FM (16K0F3E) and narrow FM (8K50F3E for the Alinco radio anyway).  12.5 kHz / 25 kHz steps, which fit this perfectly.  37225.0 kHz FM Russian taxi cab comms LMR land mobile radio VHF low band DX skip. 

Both 38.3750 MHz and 38.5750 MHz 85.4Hz PL tone are known Moscow taxi radio land mobile taxi radio dispatch frequencies, it’s possible that 37.2250 MHz is part of this same system. 

Moscow Russia Radio Taxi VHF Low Band PMR LMR Two Way Taxi Cab Radio system 30-50 MHz 37 MHz 38mhz band 85.4 Hz PL tone Moscow Oblast / Moscow Suburbs 37,225 38,375 38,575 85,4 PL tone CTCSS base mobile YL dispatcher

37.225 MHz possible additional part of this system. 

38.375 MHz 85.4 Hz CTCSS
38.525 MHz 85.4 Hz CTCSS

104

10/11 meters / Re: 27.940 MHz Data / Pager System With Constant "Idle" Signal 27940 kHz

« on: December 18, 2023, 1427 UTC »

Its popped up numerous other times when the band is open to the eastern part of Europe.  Usually the 26.945 MHz and 26.960 MHz data link frequencies are alive when 27.940 MHz is coming in. 

Seems like the 27.450 MHz FM carrier also comes in around the same time.  The other POCSAG paging frequencies, including 27.300, 27.350 and 27.360 MHz, among other in-band frequencies, also seem to pop up around this time.  Other interesting ones include the 27.845 MHz / 27.850 MHz and the offset frequency 27.848 MHz or 27.8475 MHz POCSAG signals and the 27.505 MHz POCSAG bursts, with 1-2 kHz offsets +/- from that center frequency.  Like 27.940 MHz, 27.505 MHz seems to have numerous different bandwidth signals on it.  Some of them are closer to the 6-8 kHz bandwidth, others are 14-15 kHz and others are 18-20 kHz wide (!!)

105

10/11 meters / Re: 11m Band Activity 16 DEC 2023

« on: December 18, 2023, 1420 UTC »

Nice catch.  Band looks very busy

Looks like the biggest signals are on/near:

27.105 MHz
27.125 MHz
27.135 MHz
27.155 MHz - very busy
27.165 MHz
27.185 MHz - makes sense
27.195 MHz - signal noted on the RCRS frequency
27.205 MHz
27.215 MHz
27.225 MHz - big signals
27.235 MHz
27.245 MHz
27.255 MHz
27.265 MHz - another "big radio" channel - CB Channel 26
27.285 MHz - Very strong signals, just like 27265, 27285 is a "big radio" channel/frequency - CB Channel 28
27.305 MHz
27.335 MHz
27.345 MHz
27.375 MHz LSB
27.380 MHz LSB
27.385 MHz LSB
27.390 MHz LSB
27.400 MHz LSB
27.405 MHz AM
27.435 MHz or 27.445 MHz SSB (not sure if its USB or LSB)
27.455 MHz USB - Latin American calling frequency (see also: 26.555 MHz LSB)

Numerous other SSB signals up to 27.6 MHz, 27.7 MHz.

Looks like AM carriers on/near 27.745 MHz, 27.755 MHz, 27.765 MHz, plus 27.805 MHz, 27.815 MHz and again in the 27.855 MHz, 27.865 MHz, 27.875 MHz etc. ballpark.

Several of those frequencies are confirmed Mexican taxi cab radio taxi dispatch systems, including some operating on 27.785 MHz and 27.775 MHz (which makes listening for activity on UK FM CB Channel 19, frequency 27.781.25 MHz FM a bit of a challenge).