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Messages - R4002

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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

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

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

10/11 meters / Re: 11m Activity 3 Nov 2021
« on: November 03, 2021, 1746 UTC »
Chris, that 27.030 MHz signal could be an Eastern European or Russian paging pager system or telemetry/datalink system. 

At 1730 UTC:

Lots of SSB activity in the 27.355 MHz to 27.995 MHz region. 

FSK data signal narrow band POCSAG 27833 kHz 27.833 MHz  center frequency every 5-7 seconds, good signal.  Another signal that also appears to be narrow band POCSAG noted on 27.029 MHz

26.689 MHz - narrow POCSAG - could call this 26.690 MHz too.. 26689 kHz 26690 kHz
27.029 MHz - could be your 27.030 MHz signal - narrow POCSAG 27030 kHz
27.833 MHz - narrow POCSAG  27833 kHz - I've noted identical signals on 27.838 MHz too. 
As to be expected, numerous FSK signals on 27.255 MHz, various waveforms

Other monitors have decoded numeric POCSAG signals on 27.002 MHz and 27.007 MHz - both of which could be considered offset frequencies from 27.000 MHz 27.005 MHz and 27.010 MHz.  27002 kHz 27007 kHz 27000 kHz 27005 kHz 27010 kHz

Spanish language DX booming in on 26.575 MHz, 26.585 MHz, 26.605 MHz, 26.635 MHz and several other frequencies in the 26 MHz band

Also noting taxi dispatchers on:

27.815 MHz AM
27.785 MHz AM
27.765 MHz AM
26.455 MHz AM
26.445 MHz AM
26.415 MHz AM
26.205 MHz AM
26.175 MHz AM
26.035 MHz AM
25.695 MHz AM

Also a nice strong studio to transmitter audio link on 25.950 MHz 25.95 MHz 25950 kHz FM 25.950 FM - probably WBAP AM, their STL on 25.95 MHz FM uses a 85.4 Hz CTCSS tone PL tone if I remember correctly. 

And... WWV coming in nice and strong on 25000 kHz AM 25.000 MHz AM

10/11 meters / Re: 10M Contacts
« on: October 29, 2021, 2313 UTC »
There's one repeater on 29.620 MHz I believe...and I think it's in New York or the northeast USA anyway...during one of the bigger band openings we've had in the past weeks I heard traffic on 29.620 FM as well as 29.600 FM simplex.

Also when the band is opening there's the land mobile users on 29.710 MHz FM, 29.730 MHz FM, 29.750 MHz FM, 29.770 MHz FM and 29.790 MHz FM.  I know there are car service dispatchers and taxi dispatchers in New York City on 29.770 and 29.790...plus school buses and rideshare buses on 29.79 MHz or 29.77 MHz.  There are several other users of the 29.710, 29.730, and 29.750 frequencies in that part of the country.  If you can hear those repeaters, you can hear the land mobile systems on 29.71-29.79

10/11 meters / Re: Local CB activity Morning 29 OCT 2021
« on: October 29, 2021, 1935 UTC »
Indeed.  There are several variants of the EPT3600 board.  A lot of the AM/FM export rigs like the Connex 3300, Superstar 3000, the various Galaxy rigs, General Lee, etc. I think have the same board, but with the SSB portions removed. 

I need to check CBtricks.com and take a look at those radios PCB layout compared to the all-mode exports.  I do want to say all the alignment points and adjustment points are in the same spot though. 

Yep, the Galaxy DX88 is the EPT3600-14B.  That's the same as the Superstar 3900F, Voyage VR-9000, Voyager VR-9000, etc.  The Galaxy DX77 is also the EPT3600-14B.  They're identical radios except the DX77 (and the Superstar 3900 and various clones) don't have a frequency counter.  The Connex rigs have another variant, the EPT3600-15C (I'm sure there are variants of that too)

Doing a little bit of digging, there are some Ranger/RCI rigs that use the similar, but not identical, EPT6900 series board. 

10/11 meters / Re: Local CB activity Morning 29 OCT 2021
« on: October 29, 2021, 1909 UTC »
I am originally from Cleveland. About 20-30 miles east of Chattanooga.

Still have my old Dirland SS-3900B. Probably a EPT360013B, EPT360014B/C, or similar board used by Connex, Galaxy, etc.

Have an AnyTone AT-6666 for the off-chance of actually talking these days.

The "18' End-Fed Vertical" in my forum sig is a Shakespeare 318-GBT grounded mounted over eight 9' radials and with a (W2DU-style) MFJ-915 1:1 choke at the feedpoint.

Ah, yes, Dirland!

I used to have one of the original (made in Taiwan) Superstar 3900 radios, with the EPT360011B board.  The newer Superstar 3900s had (or have?) the EPT360014B or EPT360014C board depending. 

Tons and tons of radios have the EPT3600 series board or just 3600 chassis EPT3600 chassis. 

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

10/11 meters / Re: Local CB activity Morning 29 OCT 2021
« on: October 29, 2021, 1834 UTC »
The few locals here are mostly on one frequency and talk a lot about their radios.

Back in the 1990s when I was in east TN, the locals would park on the mountain tops and try to shout down others with their usual Cobra 29s and "300-watt" amps. It could be an amusing diversion for awhile, though I tended to continue talking DX over the top of them. ;)

Ah, yes, the AM "peak" or "swing" watts.  Real men measure power output at carrier power (or RMS!).  So when I said "300 watts" I meant 75-100 watts (carrier power). 

Cobra 29s, Galaxy DX 66Vs or Connex 3300s.  Or General Lees!  Which are, of course, identical to the Connex 3300.

I can remember when I was in my teens running dogs - Raccoons/Hogs, sometimes I would get into an older guys truck and they would have an RCI2950 or Emperor TS-5010 etc and I was wowed by it. I told them, hey you can talk to people around the world with this and they were just like, oh I just leave it on channel 3 in the woods. They had no idea that it was a much more advanced radio than most people had.

Rob, you mentioned East Tennessee. My dads side of the family is from up there. Johnson City, Flag Pond, Jonesboro, Kingsport etc. The Maco 5/8 antenna I had was picked up at a garage sale near Bristol.

There are a lot of huntin' trucks with similar setups around here (Virginia).  More often than not, the CB is something like a RCI-2950 or RCI-2970, a Connex 3300, Galaxy, Superstar or similar.  I know one guy who has a Galaxy DX66V plus a Texas Star amplifier (I believe its a DX350)  as well as an older Uniden Solara VHF marine radio in his hunting truck.  According to him, he and his hunt club buddies usually use the CB radio for comms, AM mode only, in the "low channels" unless they're talking to somebody who has a regular 40 channel CB in his truck, then they simply use one of the normal channels. 

It's funny because he complained about how the CB has "more static" and of course the radio not only has FM capability but has this magical feature called squelch (that I don't think he or his hunting club friends ever used). 

Maybe that will change now that FM is a thing.

10/11 meters / Re: Local CB activity Morning 29 OCT 2021
« on: October 29, 2021, 1358 UTC »
I think CB sales might have been driven by the prepper crowd for awhile, but now it seems a little more widespread for whatever reasons. I have noted some of the popular CB shops no longer are even taking in radios for service due to existing service backlogs. o.0

Oh yeah. reminds me, my Radio Shack clone of an A99 is in storage. Need to check it, as I am thinking about using it for portable or stationary mobile ops.

Yep, that's certainly part of it.  I'm encouraging everyone I know with a truck, van or SUV to install a CB.  I actually was able to get one guy into freebanding and DXing in the process.  He bought a AnyTone AT-6666 all-mode AM/FM/SSB mobile transceiver and a Hustler IC-20 through-hole roof-mount antenna.  After a couple weeks of use, he decided that he wanted something that would "talk further".  I told him the next step would be to get the "real thing" (a 102" stainless steel antenna with a 6" stainless steel spring).  He did that, and then bought an amplifier (RM Italy KL503HD to be exact).  Now he's pushing 250-300 watts into a true 1/4 wave antenna, which, as you can imagine, means significant (local) range improvement. 

The Hustler IC-20 antenna was donated to one of his friends (it's now installed on the roof of another pickup truck) and I donated a Luiton LT-298 40-channel AM only mobile CB (a Chinese knockoff of the Uniden PRO510XL / PRO520XL series) to the cause.  There are several other folks who I've convinced that installing even a bare bones CB in their truck is worth the cost. 

Local CB here can be split into three categories:

-Local CB operators that talk on the radio on a regular basis and have home channel(s)
-Local business users, including job sites, trucking terminals and distribution warehouses, logging companies, quarries/crushed stone facilities with a coordination channel, hunt clubs, etc.
-Truckers using channel 19 and similar users, including flag car, chase car companies based in my area that use CB for car-to-car comms. 

The logging companies, truckers working for the same company and hunt clubs are big fans of the "extra channels" - for obvious reasons. 

Channel 19 AM on the West Coast has remained in active use as a trucker and highway information channel since about 1976.
Prior to that, Channel 10 AM was the ad hoc nationwide trucker channel, but some regional trucker channels (such as 17 AM and 21 AM) also existed then. 

Channel 17 AM started as one of those regional trucker channels in California.
Then 17 AM became very active up and down the coast around 1978 during the intense skip of that roaring sunspot cycle.
Eventually, around 1996 during the low point in the sunspot cycles, most truckers in California began keeping their dial locked on 19 AM instead of switching to 17 AM when they were on Interstate I-5.
17 AM eventually stopped being a trucker channel at all, and devolved into a calling and working channel for the locals in many California towns and cities.

The addition of FM to the new FCC rules will probably cause another evolution in the use of FM for truckers and local information.

The growing use of Channel 29 as an FM Trucker Channel looks eerily similar to the way previous trucker channels evolved.

Considering how many truckers seem to already have FM-capable radios installed I can definitely see your point.

I know it's not a 1-for-1 comparison but in Russia they have 27.135 MHz AM (Channel 15AM, C15AM or D15AM) as the AM road/highway/trucker channel and 27.185 MHz FM (Channel 19 FM, C19FM or D19FM) as the FM road/highway/trucker channel.  27.635 MHz FM is also used as a highway advisory channel or road channel (D19FM or E19FM) in some areas.  In larger cities, truckers use additional channels (mostly in FM mode) but Channels 15 and 19 seem to be the main channels.  Rigs designed for the Russian market have Channel 15 switches like most rigs have a Channel 9 / Channel 19 / NORM switch (or just a Channel 9 switch). 

Maybe something similar will happen here.  FM does make more sense for local short-range communications, which is what channel 19 is used for now.  Maybe 19 will eventually switch to FM and another channel will become the AM channel. 

I remember reading about the 23-channel days, back when channel 9 was the emergency channel, channel 10 was the road channel/trucker channel and channel 11 was the calling channel.  Channel 11 has remained the calling channel in many respects.  I believe the switch from 10 to 19 was, at least in part, to reduce adjacent-channel interference on channel 9 and channel 11 from heavy traffic on channel 10. 

We might end up taking a page out of the European or Russian CB book and include the mode in the channel designator - CB channel 29 FM, CB channel 19 AM, CB channel 21 AM, CB channel 31 FM, etc.

Channel 1 -
Channel 2 -
Channel 3 -
Channel 4 - this is apparently used by 4x4 groups, Jeep clubs, etc. - see also: channel 16 - AM mode
Channel 5 - heavily used by Latin American stations - AM mode
Channel 6 - we already know what channel 6 is...
Channel 7 - often similar to Channel 5, although when the band is closed its used locally - AM mode
Channel 8 -
Channel 9 - still the emergency channel, in theory, but you'll have better luck on 19. Latin American calling channel - AM mode
Channel 10 -
Channel 11 - calling channel - AM mode
Channel 12 -
Channel 13 -
Channel 14 - AM mode channel, used locally - AM mode
Channel 15 - Often also used as an AM DX channel
Channel 16 - this is apparently used by 4x4 groups, Jeep clubs, etc. - see also: channel 4 - AM mode
Channel 17 - AM DX channel, calling channel - AM mode
Channel 18
Channel 19 - road channel - highway channel - trucker channel - AM mode
Channel 20 - "testing channel" - used for DX during band openings - AM mode (for now?)
Channel 21 -
Channel 22 - used locally (around me anyway) AM mode
Channel 23 -
Channel 24 -
Channel 25 -
Channel 26 - AM DX calling channel - AM mode
Channel 27
Channel 28 - AM DX calling channel - AM mode
Channel 29 - trucker FM channel - CB channel 29 FM 27.295 MHz FM mode
Channel 30
Channel 31
Channel 32
Channel 33
Channel 34
Channel 35 - sometimes used for SSB
Channel 36 - often used for SSB, or as a local channel
Channel 37 - often used for SSB
Channel 38 - SSB calling - 27.385 MHz LSB 27.385 LSB
Channel 39 - often used for SSB
Channel 40 - AM channel, sometimes used for SSB operations as well

At 1529 UTC, some weak FM activity on 27.570 MHz

10/11 meters / Re: 11 meters 28 OCT 2021
« on: October 28, 2021, 1503 UTC »
1434 I have a strong Latin stn on ch 5, so the band may be opening?  Yesterday was a dud here, relatively speaking.

The band might be opening up...just a little later than it has been in the past week (weeks?).

CB Channel 5 is active, same with channel 6.  Noting some AM signals on 26.585 MHz AM, as well as the 26.715 MHz AM big radios channel.  Some weak AM voice on 26.765 MHz appears to be a taxi cab dispatcher...time to check the other common taxi frequencies and see if maybe those are active too...


From 1505 UTC to 1530 UTC

25695 AM 25.695 MHz AM - ahh, yes, here we go.  25.695 MHz active with the usual taxi dispatch traffic
25705 AM 25.705 MHz AM - weak taxi dispatch lady reading numbers (taxi IDs and addresses) in Spanish
26005 AM 26.005 MHz AM - weak taxi dispatch lady - Spanish language as well, barely readable
26035 AM 26.035 MHz AM - strong taxi dispatch traffic, Spanish - YL dispatch lady taxi lady
26175 AM 26.175 MHz AM - taxi dispatch, Spanish language
26515 AM 26.515 MHz AM - radio checks, sounded like a statewide US station - English language
26585 AM 26.585 MHz AM - Latin American freeband AM channel Mexican truckers, signals getting stronger
26645 AM 26.645 MHz AM - weak, heavy fading, unable to ID at 1511 UTC
26665 AM 26.665 MHz AM - Mexican CB activity, similar to 26.585 MHz AM
26715 AM 26.715 MHz AM - another couple of weak-ish AM signals on 26.715
26765 AM 26.765 MHz AM - taxi dispatch, Spanish language taxi lady dispatcher reading numbers
26935 AM 26.935 MHz AM - taxi dispatch lady reading numbers in Spanish
26965 AM 26.965 MHz AM - taxi dispatch, YL dispatcher - CB Channel 1 - can hear taxis replying to her at 1516 UTC
26975 AM 26.975 MHz AM - Spanish language, numerous stations at once - CB Channel 2
26985 AM 26.985 MHz AM - Spanish language, numerous stations at once - CB Channel 3
27015 AM 27.015 MHz AM - Absolute mess, similar to CB channel 6 during big band openings - CB Channel 5
27025 AM 27.025 MHz AM - speaks for itself - CB Channel 6
27035 AM 27.035 MHz AM - Spanish language and US stations (English) mixing together - CB Channel 7
27045 AM 27.045 MHz AM - Taxi dispatcher mixing with other Latin American stations and FSK data bursts (weak)
27195 AM 27.195 MHz AM - Taxi dispatch lady (strong) with FSK data bursts mixing in (slightly weaker)
27245 AM 27.245 MHz AM - Spanish language, very busy - CB Channel 25
27255 AM 27.255 MHz AM - Weak English language (American stations) heard - CB Channel 23 - lots of FSK QRM
27255 USB 27.255 MHz USB - Spanish language SSB traffic mixing in with FSK bursts and AM
27435 AM 27.435 MHz AM - Taxi dispatch, mixing with faint SSB signals off-frequency
27455 USB 27.455 MHz USB - Latin American SSB calling frequency
27485 AM 27.485 MHz AM - Taxi dispatch lady, strong signal at 1524 UTC
27525 AM 27.525 MHz AM - Taxi dispatch
27570 FM 27.570 MHz FM - Weak FM voice signals - seem to be closer to 27569
27575 USB 27.575 MHz USB - Spanish language
27665 USB 27.665 MHz USB - Spanish language, very good signals, mention of Monterrey
27765 AM 27.765 MHz AM - Taxi dispatcher - good signals - the usual user on this frequency

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

It appears from their chatter that some truckers may be trying to claim CB Channel 29 as their new "trucker FM channel".
Perhaps that's just local to the west coast.
Also heard weak signals, distinctively FM activity, on 27295.0 when the skip was in to the plains states earlier today.

That makes sense though.  Do they still use channel 17 and channel 21 on the West Coast in addition to 19?  Here on the East Coast its 19 but I could see Channel 29 FM as the trucker FM channel being adopted nationwide relatively quickly. 

Goes to show how many trucks are equipped with export rigs with AM and FM capability.  They've likely just never had a reason to flip that mode switch from AM to FM.  Looking at pictures of the Connex 3300, General Lee, General HP40W (a General Lee with an amplifier on the bottom), Connex CX33HPC1, the Stryker radios, the Superstar 3000, Superstar 121, most of the Galaxy rigs, etc. - most of them have AM/FM/PA as a three-position knob or AM/FM switch as a two-position switch on the front panel.  These guys have had FM capability for a while.

By the way, happy FM is legal on CB day (October 28th, 2021).  See: https://www.govinfo.gov/content/pkg/FR-2021-09-28/pdf/2021-19399.pdf   

Changes effective October 28, 2021.  FM emission type F3E is now permitted on the CB Radio Service in the United States.  47 CFR 95.971: 

(a) Permitted emission types. CBRS
transmitter types must transmit AM
voice emission type A3E or SSB voice
emission types J3E, R3E or H3E, and
may also transmit FM voice emission
type F3E.

Maximum bandwidth: 8 kHz
Maximum carrier power: 4 Watts FM
FM deviation shall not exceed +/- 2 kHz 2kHz FM deviation

8K00A3E emission designator for AM voice
8K00F3E emission designator for FM voice
4K00J3E 4K00H3E 4K00R3E emission designators for SSB voice

FM CB radio is now legal!  AM continues to be the standard mode for CB radio in the USA, FM and SSB are optional modes. 

I just updated the first post in this thread to reflect the use of CB channel 29 FM 27.295 MHz FM 27.295 FM as the trucker FM CB channel.

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