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Messages - R4002

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1
Back on at 1700 UTC:



25875 AM - 25.875 MHz AM - Weak AM signal noted, probably taxi cab dispatch based on frequency and mode
26065 AM - 26.065 MHz AM - Spanish language, very weak
26585 AM - 26.585 MHz AM - Spanish language - Mexican trucker 26MHz channel
27025 AM - 27.025 MHz AM - CB Channel 6 - Busy, as to be expected
27065 AM - 27.065 Mhz AM - CB Channel 9 - Spanish language, this is the in-band calling channel, sort of like 6/11
27075 AM - 27.075 MHz AM - CB Channel 10 - Spanish language with whistling into mic
27085 AM - 27.085 MHz AM - CB Channel 11 - AM calling channel, busy
27105 AM - 27.105 MHz AM - CB Channel 12 - US stations
27185 AM - 27.185 MHz AM - CB Channel 19 - busy, noisy heterodyne (not surprising)
27200 USB - 27.200 MHz USB - Spanish language chatter, in-between channels 19A and 20
27205 AM - 27.205 MHz AM - CB Channel 20 - US stations
27225 AM - 27.225 MHz AM - CB Channel 22 - US stations
27245 AM - 27.245 MHz AM - CB Channel 25 - US stations
27255 AM - 27.255 MHz AM - CB Channel 23 - US stations, fair to weak copy
27265 AM - 27.265 MHz AM - CB Channel 26 - active with US stations working AM DX
27285 AM - 27.285 MHz AM - CB Channel 28 - active with US stations working AM DX
27305 AM - 27.305 MHz AM - CB Channel 30 - US stations
27355 AM - 27.355 MHz AM - CB Channel 35 - US stations
27385 LSB - 27.385 MHz LSB - CB Channel 38 - active with US based stations working DX
27405 AM - 27.405 MHz AM - CB Channel 40 - active
27445 USB - 27.445 MHz USB - Spanish language chatter
27455 USB - 27.455 MHz USB - Spanish language, Latin American 11m SSB calling frequency
27475 AM - 27.475 MHz AM - Spanish language, with roger beeps
27555 USB - 27.555 MHz USB - Weak SSB traffic noted at 1716 UTC
27655 USB - 27.655 MHz USB - Spanish language, OMs chatting


The use of SSB on 27200 is interesting.  I've seen sideband activity in the lower in-band channels before (defined as channels 1-23 so 26965 to 27255).  Usually its on channel 16.  This is doubly interesting because its on an offset frequency from 27.195 MHz and 27.205 MHz, or 5 kHz up from RC channel 27.195 MHz.  Would make more sense to use LSB vs. USB but the users didn't seem to have any issues with QRM even though there was quite a bit of chatter on 27205 AM. 

2
Weak FM signal on 29600 29.600 MHz,

29620 FM 29.620 MHz FM 29.62 MHz FM active with YL and OM operators having a QSO, noted repeater tone burst at the end of the transmissions...am yet to hear a callsign or repeater ID

3
Checking some KiwiSDRs

W3HFU KiwiSDR - Westminster, MD - band fairly quiet, but some Latin American activity coming in, including taxi cabs on 25 MHz and 26 MHz and somebody playing sound effects and music clips on 28005.0 AM (with Spanish language over it, lots of echo too!) - CBers on 10 meters

25695 AM - 25.695 MHz AM - Taxi cab dispatcher, YL dispatch lady talking to OM driver, roger beeps heard (poor copy)
26035 AM - 26.035 MHz AM - Taxi cab dispatcher, YL reading numbers with roger beep, good copy
26365 AM - 26.365 MHz AM - Spanish language chatter, poor copy - possible taxi cab dispatch
26375 AM - 26.375 MHz AM - UNID Spanish language chatter, presumably Latin American taxis or truckers
26395 AM - 26.395 MHz AM - Spanish language QSO
26405 AM - 26.405 MHz AM - Spanish language, weak
26415 AM - 26.415 MHz AM - Spanish language, two OMs chatting, poor copy
26475 AM - 26.475 MHz AM - Spanish language - two OMs having a QSO, Mexican accents
26485 AM - 26.485 MHz AM - Very weak AM signal noted, unable to copy language
26565 AM - 26.565 MHz AM - Spanish language OMs, Mexican accents
26575 AM - 26.575 MHz AM - Spanish language, not as busy at 26.585 AM but similar signal strengths
26585 AM - 26.585 MHz AM - Spanish language - Mexican trucker freeband frequency, very busy at points
26715 AM - 26.715 MHz AM - Puerto Rico and other locations BOOMING in at 1520 UTC, 1522 UTC
26765 AM - 26.765 MHz AM - English language, US stations, southern accents
26935 AM - 26.935 MHz AM - Taxi cab dispatch, YL dispatcher and OM driver heard, with roger beeps at 1408 UTC

numerous in-band channels active, not listing them on this log due to the amount of out of band activity

27455 USB - 27.455 MHz USB - Spanish language SSB calling channel (similar to 26555 LSB) - active with several signals at once
27545 AM - 27.545 MHz AM - Spanish language, lots of noise toys and sound effects heard, including the Mario Bros. theme song
27655 LSB - 27.655 MHz LSB - Spanish language with end of transmission roger beep
27755 AM - 27.755 MHz AM - Spanish-speaking OMs, one station off-frequency on 27756.2
27765 AM - 27.765 MHz AM - Taxi cab dispatcher, YL reading numbers with roger beep - Spanish language
27785 AM - 27.785 MHz AM - Spanish language chatter, OM operators - possibly truckers or similar considering their use of AM
27875 AM - 27.875 MHz AM - "616" "615" heard (OM dispatcher with roger beep)
28005 AM - 28.005 MHz AM - Spanish language, music and sound FX heard at 1417 UTC

Around 1425 UTC or so, the band seemed to close a bit, this might have been a short-lived Sporadic-E opening

Checked back in at 1450 UTC

4
KiwiSDR: SDR on Izhevsk cityIzhevsk, Russia | Grid LO66ou, ASL 32 meters

56.836560, 53.227097 or 5650'11.6"N 5313'37.6"E

1100 UTC - 1115 UTC  - 22 September 2021



26945 FM - 26.945 MHz FM - FSK data bursts - likely pager systems (numerous signals on frequency)
26960 FM - 26.960 MHz FM - FSK data bursts - likely pager systems (numerous signals on frequency)
27105 FM - 27.105 MHz FM - FM CB chatter, Russian language
27120 CW - 27.120 MHz Possible ISM or CW beacon? - Two dits every 4-5 seconds on 27120.2
27135 AM - 27.135 AM - Busy channel, Channel C15EA or D15EA - trucker/road channel, similar to 27185 AM
27370 FM - 27.370 MHz FM - FSK data bursts - data link or pager system paging system, similar to 26960 and 26945

5
So I noticed that in addition to Highland Falls, NY 27.255 MHz FSK network, there are at least two other KiwiSDRs that have FSK data burst networks local to them.  The signals on these are identical to the signals noted on the Highland Falls, NY KiwiSDR (WB2EEE).

*N1NTE-1 Holland, MA (grid FN32) 42.032759 N, 72139970 W - 27.255 MHz - strong to fair to weak FSK data bursts, same format as the other receivers, much wider range of signal strengths, possibly indicating multiple systems with coverage overlapping this receiver's RX range capability

*WA2ZKD/1 Rockport, Maine (grid FN54le) 44.175034 N, 69.079214 W - 27.255 MHz - strong FSK bursts

*N2LAW Brookline, New Hampshire (grid FN42dr) 42.711372 N, 71.669474 W - 27.255 MHz - strong to fair FSK bursts, same format as the Highland Falls, NY and Rockport Maine KiwiSDRs.

Rockport, Maine and Brookline, New Hampshire are about 175 miles straightline distance from each other...and, as I'm typing this, the band appears to be almost entirely closed at those locations so the presumption is that the 27255 systems are within a 10-20 mile radius of the receiver locations.

There are a lot of receivers to look through...I am currently on another KiwiSDR in Jumonville, PA and 27255 is clear except for local AM CB chatter.  I am noticing a fair amount of out of band 11 meter activity, especially on 27505 AM, 27510 USB, 27535 AM, 27555 USB, 27560 USB, 27615 AM and 27630 USB but given the lack of any other activity on the band I would venture that the activity I'm hearing is somewhat local (unless the band is starting to wake up at 20:25 UTC - 20:30 UTC.

Maybe the band is starting to wake up after all.  Numerous new signals popping up in the legal 40 CB band 26965-27405 (the Usual Suspects, 27025 AM, 27085 AM, 27265 AM and 27285 AM active) and several additional active frequencies in the 27410-28000 range showing up on the Jumonville PA KiwiSDR.  27445 LSB, 27455 USB and some others.  27255 now has a strong AM QSO going on it, no sign of the familiar FSK bursts though.

I will continue to check SDRs in my free time and update this list accordingly.  Consider it a work in progress to see how many of these systems on 27255 (and the other Part 95 RC frequencies - 26.995, 27.045, 27.095, 27.145 and 27.195) are local to these KiwiSDRs.

*Izhevsk city Izhevsk, Russia | Grid LO66ou:  26.945 MHz and 26.960 MHz - near-constant FSK paging or data burst datalink system



*List:

-WB2EEE Highland Falls, NY - 27255 27.255 MHz FSK - local FSK data link
-N1NTE-1 Holland, MA (grid FN32) 42.032759 N, 72139970 W - 27255 27.255 MHz FSK - local/semi-local FSK data link(s)
-WA2ZKD/1 Rockport, ME (grid FN54le) 44.175034 N, 69.079214 W - 27255 27.255 MHz FSK - local FSK data link
-N2LAW Brookline, NH (grid FN42dr) 42.711372 N, 71.669474 W - 27255 27.255 MHz FSK - local FSK data link
-Izhevsk, Russia (grid LO66ou) - 26945 26.945 MHz FSK - local FSK data link, different format compared to the "standard"
-Izhevsk, Russia (grid LO66ou) - 26960 26.960 MHz FSK - local FSK data link, different format compared to the "standard"

6
Interesting - so not related to the 9738 kHz USB 9738 USB 9.738 MHz USB Spanish language UNID chatter

7


26945 FM - 26.945 MHz FM - FSK data bursts - likely pager systems (numerous signals on frequency)
26960 FM - 26.960 MHz FM - FSK data bursts - likely pager systems (numerous signals on frequency)
27055 FM - 27.055 MHz FM - Weak FM signals
27075 FM - 27.075 MHz FM - Weak FM signals
27115 FM - 27.115 MHz FM - OM speaking Russian, roger BLEEP
27125 FM - 27.125 MHz FM - Weak FM signals noted
27135 AM - 27.135 MHz AM - Russian language, OMs heard, local (??) carrier signal on 27134.9, very busy channel
27145 FM - 27.145 MHz FM - OM and YL heard, possibly taxi dispatch or taxi controller
27175 FM - 27.175 MHz FM - Russian language, OMs heard, good signals
27215 FM - 27.215 MHz FM - Very busy channel
27250 FM - 27.250 MHz FM - Weak signals (FM signals)
27405 FM - 27.405 MHz FM - FM signal noted, didn't tune to it in time
27505 FM - 27.505 MHz FM - Possible taxi cab dispatcher? 


8
Checked back in at 1820 UTC (2200 local time)


26865 kHz FM - 26.865 MHz FM - Weak FM signal, UNID, didn't tune to it in time to hear anything
26940 kHz FM - 26.940 MHz FM - FSK data bursts - weaker
26945 kHz FM - 26.945 MHz FM - FSK data bursts - likely paging systems
26950 kHz FM - 26.950 MHz FM - FSK data bursts - paging systems, similar to pager signals on 26960 26.960 MHz
26960 kHz FM - 26.960 MHz FM - FSK data bursts - likely paging systems - some very strong signals, some weaker
26985 kHz AM - 26.985 MHz AM - Weak AM signal noted at 1826 UTC
27135 kHz AM - 27.135 MHz AM - OM operators talking, sometimes several signals at once, road/traffic channel
27200 kHz FM - 27.200 MHz FM - OM CBers, very active (still) - several signals pushing S9+30dB
27425 kHz FM - 27.425 MHz FM - OM heard, weak signal, unsure if CBer or local land mobile taxi dispatch/taxicab

several hooks noted:

start: 26845 or 26850 26.845 MHz 26.850 MHz
end: 26800 kHz 26.800 MHz

start: 26800 kHz 26.800 MHz
end: 26775 kHz 26.775 MHz

start: 26845 kHz 26.845 kHz
end: 26790 kHz 26.790 MHz

start: 26695 kHz 26.695 MHz
end: 26650 kHz 26.650 MHz

9
1030 UTC / 1430 local


Even more ISM hooks all over the 26-28 MHz region on the waterfall today.  A couple of them are actually within the 26957-27283 ISM region. The 26.945 MHz and 26.960 MHz paging systems are, as to be expected, super busy.  26945 especially so.  The 27200 FM guys were really strong.  27135 AM (channel 15 AM) is apparently used like 27185 AM is here in the USA.

26945 kHz FM - 26.945 MHz FM - FSK data bursts - likely paging systems (numerous signals on frequency)
26960 kHz FM - 26.960 MHz FM - FSK data bursts - likely paging systems (numerous signals on frequency)
27125 kHz FM - 27.125 MHz FM - Weak FM signal, including several seconds of unmodulated carrier
27130 kHz FM - 27.130 MHz FM - Sounds like taxi cab dispatch
27135 kHz AM - 27.135 MHz AM - Two OM CBers chatting, fair signals - busy nearly constantly
27195 kHz FM - 27.195 MHz FM - Weak FM signals on frequency, some QRM from the 27.200 MHz guys
27200 kHz FM - 27.200 MHz FM - Two OM CBers chatting, very strong signals, SIO 555 nice FM audio
27255 kHz FM - 27.255 MHz FM - Caught tail end of a FM voice transmission in Russia
27585 kHz FM - 27.585 MHz FM - Weak YL voice heard, presumed taxi dispatcher/ taxi controller 27.585 FM

10
LO66ou grid, Izhevsk Russia

Band pretty quiet this evening (2300 local time likely explains why) - but the 26.945 MHz and 26.960 MHz paging systems were very busy.  26.960 MHz had signals on it nearly nonstop.  Lots of "hooks" (ISM signals) both within and above and below the 26957 - 27283 ISM band. 

26945 kHz FM - 26.945 MHz FM - FSK data bursts - likely paging systems (numerous signals on frequency)
26960 kHz FM - 26.960 MHz FM - FSK data bursts - likely paging systems (numerous signals on frequency)
27130 kHz FM - 27.130 MHz FM - YL taxi dispatcher (I think) - taxi cab controller
27135 KHz FM - 27.135 MHz FM - CBer, Russian (obviously) - much stronger than the 27130 signal
27225 kHz AM - 27.225 MHz AM - OM CB operator heard, weak signal
27645 kHz FM - 27.645 MHz FM - Taxi cab dispatch, YL dispatcher (weak)




11
10/11 meters / Re: 11 meter beacons
« on: September 08, 2021, 1601 UTC »
I had very good reception of the 69BY beacon yesterday.

On which frequency? 27550 or 27610?

27609.9 IIRC.

Okay cool - it's good to get a confirmation that the 69BY 11 meter beacon is still on the air and using 27610 / 27.610 MHz...well, 27609.9 / 27.6099 MHz anyway

12
Hearing two Spanish-speaking OMs on 27.065 MHz AM - 27065 AM - CB channel 9.  Strangely, 26585 AM, 26705 AM, 26715 AM are all quiet...but 27065 AM is busy.

The rest of the band is basically dead at the moment..

13
Yep, 27.015 AM is one of them (CB channel 5). 

Others to check when 27015 AM is active are:

26585 AM / 26.585 MHz AM and nearby channels (26.565 MHz, 26.575 MHz, 26.595 MHz, etc.)

26705 AM / 26.705 MHz AM
26715 AM / 26.715 MHz AM

and

27065 AM / 27.065 MHz AM - that's right, CB channel 9.  26705 AM and 26715 AM are very popular with stations in Florida, Puerto Rico and other parts of the Caribbean.  26585 AM is one of the popular Mexican trucker channels. 

14
10/11 meters / Re: 11 meter beacons
« on: September 06, 2021, 1526 UTC »
I had very good reception of the 69BY beacon yesterday.

On which frequency? 27550 or 27610?

15
Morning activity - not sure if the band is starting to wake up or if this is just sporadic-E

25695 AM - YL taxi cab dispatcher with roger BLEEP
25745 AM - Spanish language, presumed taxi cab dispatch
26175 AM - OM and YL chatting, Spanish language, possibly also a taxi dispatcher (weak)
26205 AM - YL taxi dispatcher - Spanish language
26365 AM - Spanish language, weak, OMs chatting...possibly truckers, does not sound like taxi cab dispatch lady
26455 AM - Spanish language chatter with roger beeps, possibly a taxi dispatcher
26515 AM - Spanish language, very weak
26565 AM - Spanish speaking OM heard
26585 AM - Spanish language, multiple stations at points, Mexican trucker and taxi common channel
26665 AM - Spanish language, weak
26705 AM - Spanish language, heard mention of Puerto Rico (the usual suspects here - expect 26715 AM and others)
26935 AM - UNID, AM voice activity, weak
27015 AM - Spanish language - CB channel 5

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