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Messages - R4002

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286
10/11 meters / 27.815 MHz Taxi Dispatcher Mexico City DF Mexico
« on: October 25, 2021, 2217 UTC »
Huge band openings lately - tons of taxi dispatchers from 25.615 MHz up through the legal 40 CB band into the uppers 27.415-27.855 MHz and the 27.865 MHz - 27.995 MHz region.

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

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

287
10/11 meters / Re: 10m/11m DX Activity 22 Oct 2021
« on: October 22, 2021, 2100 UTC »
1908 Starting to get some Latin American DX now. In addition to the usual stuff, I have some on channel 7 in FM mode. Earlier this morning I heard a local on channel 12 in FM mode.
1918 27440 FM now also
1932 I thought 26575 was FM, but it's actually AM with a lot of FMing. Maybe he has the prototype Stretchyman® CB rig  :P
1934 I saw what looked like an RC signal of some sort on channel RC-3A
1943 Quite a mix on 38L, Jamaica, Oregon, and more.

That RC signal came back, here's a picture:




FM also on 27.125 MHz earlier.

That signal on 26.995 looks like numerical POCSAG.  Heard all over 11 meters...including on oddball offset frequencies like 27.007 MHz or 27.888 MHz or 27.838 MHz or 27.272 MHz. 

See: https://youtu.be/I_uHGpciZxY

and

https://youtu.be/nNCDFTOyUVQ

Both on 27007 kHz / 27.007 MHz

288
10/11 meters / Re: 10m/11m DX Activity 22 Oct 2021
« on: October 22, 2021, 2030 UTC »
Band waking up indeed.  Noted AM voice traffic - possibly taxi dispatcher on 7A - 27.045 MHz. 

Lots of activity in the 25615-26955 region (low bands).  26.715 MHz and 26.735 MHz are really blowing up.  26.585 MHz also busy, now noting AM voice on RC channel 27.195 MHz...

Weak FM now on 26.645 MHz.

26.555 MHz LSB also active, below 26.500 MHz:

26.405 MHz AM
26.375 MHz AM
26.265 MHz AM
26.205 MHz AM
26.175 MHz AM - the usual taxi dispatcher radio traffic on this frequency
26.065 MHz AM - taxi dispatch
25.925 MHz AM

Noting the usual mix of SSB chatter and AM taxi cab dispatch comms on 27.815 MHz.  27.875 MHz AM also active with taxi cab dispatch traffic. 

27.200 MHz USB active again too!

289
10/11 meters / Re: 11 meter opening 1630 UTC 21 Oct 2021
« on: October 21, 2021, 1659 UTC »
Band is opening up a bit more now:

25695 AM 25.695 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beeps
25955 AM 25.955 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beeps
26035 AM 26.035 MHz AM - Taxi dispatch lady reading numbers in Spanish, talking to taxi cabs, good signal
26175 AM 26.175 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beeps
26205 AM 26.205 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beeps
26245 AM 26.245 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beeps
26375 AM 26.375 MHz AM - OM heard - Spanish language, some fading..likely freebanders
26415 AM 26.415 MHz AM - OMs - Spanish language, single tone roger beep
26555 LSB 26.555 MHz LSB - Spanish language chatter
26575 AM 26.575 MHz AM - Two stations doing radio checks (in Spanish) at 1655 UTC
26585 AM 26.585 MHz AM - Latin American low channel 26 MHz AM calling channel - busy
26645 AM 26.645 MHz AM - Taxi dispatch lady reading numbers in Spanish, heard OM taxi cab reply to her on frequency
26665 AM 26.665 MHz AM - Weak signals, heard music and sound FX
26695 AM 26.695 MHz AM - Tail end of an AM signal noted at 1657 UTC
26785 AM 26.785 MHz AM - Weak, sounds like Spanish or maybe Portuguese
26905 AM 26.905 MHz AM - Taxi dispatch - YL dispatcher reading taxi ID numbers in Spanish

At 1700 UTC:

27255 AM 27.255 MHz AM - CB Channel 23 - heard two US truckers talking to each other, mixing in with another Spanish language taxi dispatch radio channel (could hear the YL dispatch lady and the OM driver)


26765 AM 26.765 MHz AM - Taxi dispatch - YL dispatcher (strong) working weak OM taxi driver on radio
27545 AM 27.545 MHz AM - Taxi dispatch lady - very heavy fading 
27745 AM 27.745 MHz AM - Taxi dispatch lady reading numbers in Spanish with 3-beep end of transmission tone burst
27755 AM 27.755 MHz AM - Taxi dispatcher with similar-sounding end-of-transmission "burst" (see 27.745 MHz)
27765 AM 27.765 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beep (single tone beep)
27785 AM 27.785 MHz AM - Taxi dispatch lady reading numbers in Spanish with roger beep
27905 LSB 27.905 MHz LSB - Spanish language freebander chatter - two stations having a QSO

At 1710 UTC, checked 25.695 MHz AM - taxi radio coming in stronger now, same taxi dispatcher usually heard on this frequency.  Taxis love 25 MHz.  Also 26 MHz and 27 MHz and 28 MHz.  Noted similar activity - taxi controller radio taxi dispatch on 27095 AM 27.095 MHz AM - R/C channel - 11A.   Taxi dispatcher also heard on CB channel 21 - 27.215 MHz AM.  I've heard this particular taxi dispatcher before (I think) - the one on channel 21.

At 1720 UTC

The 26 MHz band Latin American big radio channels are very much alive,

26.565 MHz AM
26.575 MHz AM
26.585 MHz AM
26.595 MHz AM
26.605 MHz AM
26.615 MHz AM
26.635 MHz AM

all active


290
The prototypical AM/FM export rigs - those made by Ranger/RCI - including the Superstar 3000, Connex 3300 series, Mirage MX36HP and similar, Galaxy DX29, DX33, DX44, DX55 series, DX66, DX66V2, DX66V3, General Lee, General HP40W, Superstar 121, Connex Deer Hunter, Connex Coyote Hunter, etc. etc. were/all AM/FM only.  The vast majority of those rigs cover the same 6-band A-B-C-D-E-F selector + 40 channel selector channel plan (frequency coverage 25.615 MHz to 28.305 MHz, with Band D being the legal CB band). 

There are some variants on that, including rigs like the Superstar 121 (which simply has a 3 position LOW/MID/HIGH band switch - with the legal CB band being MID band, coverage 26.515-27.855 MHz) and the obviously geared towards the hunting truck guys radios like the Connex Deer Hunter (3 bands, but coverage is 26.065-27.405 MHz and the band select is labeled B/C/D instead) or the Connex Coyote Hunter (4 bands, coverage 25.615-27.405 MHz - A/B/C/D bands).  I've talked to several hunters who use rigs like the Galaxy DX66, Connex 3300, Superstar 3000, etc. and they all use/used the lower bands (so bands A/B/C - 25.615-26.955 MHz), use AM mode and run their radios with amplifiers. 

Many hunting clubs are migrating to licensed business radio + export CB equipment (at least in my area).  So the standard hunting truck has two communications antennas - a CB antenna and (usually) a VHF high band antenna.  Most of them use hunting dogs with GPS radio collars (and the radio collars use the MURS frequencies).  Hunting outfitters sell VHF mag mount antennas to extend the range of the GPS dog collar's companion receiver so it is not uncommon to see hunting trucks with a CB antenna and 2, 3 or even 4 VHF antennas.  Often the hunters will use export CB rigs to communicate while their dogs track (and they watch their dogs' GPS signals on the receivers in their trucks).  Many guys, especially in the more rural areas, also use the VHF marine band in addition to export CB radios.  The "standard" setup is often an export rig (with at least access to the "lowers" or "low channels", an amplifier and additional VHF gear.  I've seen local hunting trucks with Texas Star DX350 DX500 or DX667 and RM Italy KL503s and other amplifiers so output power on 11m is pushing way past 100 watts. 

Of course, they're still using AM mode...even though almost all their radios have FM capability.  It seems like AM is used for simplicity's sake (backward compatibility with guys who have regular "street legal" 40 channel CB rigs and other CBers...)

That might be changing now too though...


291
10/11 meters / 11 meter opening 1630 UTC 21 Oct 2021
« on: October 21, 2021, 1635 UTC »
Hearing lots of Spanish language DX coming in on 26.585 MHz AM (the usual Mexican and Caribbean and other locations) coming in on top of each other.  Lots of music, sound FX, roger beeps/noise toys, etc. as well

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

292
Hasenberg Switzerland
Grid: JN47ei
47°22'41.7"N 8°21'53.9"E GPS lat/long minutes seconds
47.378250 N, 8.364972 E GPS lat/long coordinates decimal degrees

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

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

11 meter logs 


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

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

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

293
I was thinking the other day about how AM/FM - CB/Export/Free band radios have been around for a long time. Particularly brands such as Galaxy, Mirage among others. No one ever talked about using FM though. I guess they just bought them because the radios sounded better etc. I never understood spending that kind of money for a radio without sideband. Just my opinion. Was FM more popular in other countries between 25 - 27.999 Mhz ? Years ago when I was heavy into that frequency range, I would have never even thought about it.

Outside of the Americas and Australia/New Zealand, almost everywhere else that has a CB band allows use of FM.  Some countries allow only FM (for a long time the UK only permitted FM...they only recently legalized AM and SSB on the European standard CEPT 40 channels - the same channel plan as the USA channels or the "FCC CB channels" - often called "mid band CB").  The 40 UK-only 27/81 channels - UK FM CB 27.60125 MHz - 27.99125 MHz in 10 kHz steps - is still, and will probably remain FM only.

The German, Hungarian, Czech, etc. "auxiliary" channels (26.565 MHz - 26.955 MHz in 10 kHz steps) are also FM mode only.  The European standard CB band is the same as the US CB band but is FM only.  Many countries permit use of AM and SSB as well as FM...now that the US permits FM it has come full circle.

As far as the AM/FM exports go, I agree.  Those radios have had FM mode since the 1980s, which makes sense if you're using them in Europe you'd need FM.  But until now, I'm sure 99% of the folks using those radios never touched the mode switch (unless its one of the more expensive AM/FM/SSB export rigs).  I know some of the exports sold are actually AM mode only but the vast majority of them are AM/FM.  I think people bought them more because they have additional channels and higher power output instead of because they have FM mode.

Now people might buy them for all those reasons plus the fact that they have FM mode as well.  I've found at least one guy selling FM boards to add to your AM only 40-channel CB rig as a modification to turn your 40 channel AM CB radio into a 40 channel AM and 40 channel FM CB radio. 


294
10/11 meters / Re: 11 meters is opening up again 1345 UTC 20 Oct 2021
« on: October 20, 2021, 1629 UTC »
The taxi cab dispatch radio systems taxi dispatch ladies are starting to fade in now - hearing activity on 27.765 MHz AM, 27.775 MHz AM, 27.785 MHz AM and several other frequencies.

Checking 29.7 MHz to 30.0 MHz and 30-32 MHz real quick...not too much even in 10 meters. 

295
10/11 meters / Re: 11 meters is opening up again 1345 UTC 20 Oct 2021
« on: October 20, 2021, 1517 UTC »
26.805 MHz was active a bit ago with some FM stations.  Some sporadic FM activity on channel 23 / 27.255 MHz, but it's mostly AM voice and various data bursts....making for a pretty much frequency at points.

296
1456 26805 OM in Texas, good signal

27255 (Channel 23 - 27.255 MHz) is 26.805 MHz up one band - I've noticed several FM voice transmissions on 27.255 MHz (mixing in with the AM voice transmissions and data bursts now that the band is open).

Channel 23 up one band is 27.705 - wouldn't surprise me if we started noticing FM activity on 26.805 MHz, 27.255 MHz and 27.705 MHz.

I still think designating channels 27 27.275 MHz for FM CB use as well as channel 31 27.315 MHz FM for FM CB use makes more sense than using 27.255 (channel 23). 


297
FM activity on 26.805 MHz right now (1453 UTC)

298
10/11 meters / Re: 11 meters is opening up again 1345 UTC 20 Oct 2021
« on: October 20, 2021, 1453 UTC »
FM activity on 26.805 MHz right now (1453 UTC)

Several more 26 MHz frequencies now active.  Also some AM voice on 27.045 MHz and 27.095 MHz RC channels. 

Watching 27.255 / CB Channel 23 right now (1500 UTC)

Lots of AM carriers, several different data link data bursts on frequency, with the familiar pair of FSK signals on 27.252 MHz and 27.257 MHz.  Also noting narrower single FSK signals centered on 27258 27.258 MHz or maybe 27257.5 27.257.5 MHz. 

FM voice on 27.255 MHz / CB channel 23 at 1504 UTC!   ;D

And...back to AM voice + FSK data transmissions...

299
10/11 meters / Re: 11 meters is opening up again 1345 UTC 20 Oct 2021
« on: October 20, 2021, 1420 UTC »
26.555 MHz LSB showing some early activity at 1410 UTC.  Channel 9 27.065 MHz AM is also very busy.  As to be expected, 26.715 MHz is also very busy.  At 1421 UTC hearing Spanish on 26.725 MHz AM as well as 26.715 AM and 26.705 AM. 

Caribbean DX also booming in on 27.515 MHz LSB.  27.500 MHz USB active with some weaker traffic at 1415 UTC.

Other active frequencies:



25.695 MHz AM - the usual taxi dispatcher lady reading numbers in Spanish - YL taxi cab dispatch 25 MHz
26.035 MHz AM - taxi dispatch traffic - YL reading taxi numbers in Spanish language
26.055 MHz AM
26.105 MHz AM
26.335 MHz AM
26.375 MHz AM
26.405 MHz AM
26.475 MHz AM
26.555 MHz LSB - Spanish language/Latin American calling frequency (low channel - Channel 4 low band, LSB)
26.585 MHz AM - Spanish language, sporadic signal...heavy fading/QSB - popular free band channel for Latin America
26.625 MHz AM - Spanish language
26.765 MHz AM - Spanish language, weak
26.835 MHz AM - US and Caribbean stations, "Triple 777" "Duck Hunter" and others heard at 1430 UTC - 1432 UTC
26.840 MHz FM - POCSAG signal noted (weak)
26.895 MHz AM - Taxi cab radio - YL dispatcher talking to OM drivers at 1434 UTC
27.455 MHz USB - Spanish language/Latin Ameican calling frequency (high channel - Channel 4 high band, USB)
27.465 MHz USB
27.500 MHz LSB - now booming in just as strong as 27.515 LSB (at 1426 UTC)
27.500 MHz USB
27.505 MHz USB
27.555 MHz USB - International 11 meter calling frequency the triple 5 27555 27.555 USB
27.570 MHz USB
27.645 MHz USB


Lots of fish hooks popping up - both within the 26.957 MHz - 27.283 MHz Part 18 ISM band and above channel 40 and below channel 1.  Also several over the horizon radar signals jumping around the band - noted center frequencies 27.925 MHz, 27.955 MHz, 27.710 MHz, 27.765 MHz, 27.650 MHz, 27.785 MHz, 27.965 MHz and several others in the 27.6 MHz to 28.0 MHz region..

Checked a KiwiSDR in Switzerland - http://hasenberg700m.ddns.net:8074/ - tons of pager signals in the 26 MHz portion and lots of SSB traffic above channel 40

Active 26 MHz European paging pager and telemetry frequencies:

26.200 MHz FM - weak POCSAG or similar signal noted, roughly 8-9 kHz wide
26.350 MHz FM
26.555 MHz FM - numerous signals on frequency, some pushing S7
26.600 MHz FM - numerous signals on frequency
26.610 MHz FM - numerous signals on frequency
26.670 MHz FM - at least two different signals, one closer to 26.672
26.695 MHz FM
26.700 MHz FM
26.705 MHz FM - numerous signals on frequency, some pushing S9 easily
26.745 MHz FM - numerous signals on frequency
26.750 MHz FM
26.755 MHz FM - numerous signals on frequency
26.845 MHz FM
26.850 MHz FM
26.855 MHz FM - numerous signals on frequency
26.900 MHz FM
26.950 MHz FM


300
10/11 meters / 11 meters is opening up again 1345 UTC 20 Oct 2021
« on: October 20, 2021, 1351 UTC »
11 meters is starting to wake up

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