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 permissible in your locale.

Author Topic: Taxicab Dispatchers on the 11-meter and 10-meter band.  (Read 3104 times)

Offline R4002

  • Moderator
  • DXing Phenomena
  • *****
  • Posts: 3001
    • View Profile
    • R4002 - YouTube Videos
Taxicab Dispatchers on the 11-meter and 10-meter band.
« on: April 12, 2013, 1658 UTC »
Hey all,  I know in Europe they have a big problem now with Russian/CIS/former USSR taxicab interference on the CB/11 meter freeband and in the bottom of 10 meters.  

The same thing is now happening in North America (at least at my QTH in Richmond, VA).  When the band is open to the south not only can I hear taxicab dispatchers in NFM using 10 or 20 kHz spacing above 30.000 MHz, up into 31 and 32 MHz, with domestic U.S. business band skip... (I've even seen them on 30.115 MHz, AM, I assume that's using CB gear and not land mobile lowband gear because the NFM activity all has CTCSS tones).  

This part of listening to 11-meters really interests me.  My Spanish is not that great but its easy enough to figure out that what you're listening to is taxi dispatchers (or at least another kind of business radio system) vs. just regular freebanders/outbanders/pirates/CB bandits or whatever you wanna call em.  I've noticed that they tend to hang out in the lower parts of the de-facto "11 meter bands" so band A on most exports is either 25.165 - 25.605 MHz or, more commonly, 25.615 to 26.055 MHz.  There's been points where I could hear activity (all in AM save for STLs on 25.990 and 25.910, I bet they're glad they're not using the .xx5 MHz step!) every 10kHz from 25.615 to 26.055, including the "A channels").  Some of these newer exports no longer just cover 25.615 to 28.305 MHz anymore.  Some of them go above the top of 10-meters and into the 30MHz band (keeping the CB-like channel plan of course).  I'm pretty sure the Magnum S9 can go up to 32.990 MHz and down to below the 12-meter band.  Obviously the radio needs to be tuned for the band in question.

Another interesting frequency commonly used appears to be 27.515.  Channel 9 is very popular for some reason, CH9 in the legal band is 27.065 and is nothing but Puerto Rico, CH9 "down one band" is 26.615 and that's another really popular AM calling frequency (see also, 26.585, 26.595, and 26.605) but CH9 "up one band" is 27.515 which is also the Caribbean LSB DX frequency.  Many times I've heard an AM taxi cab dispatcher completely obliterating the high power stations from Jamacia on 27.515 LSB.  Has anybody else experienced this?  

Is it strange that people using 11m for business radio communications needs is one of the things that I consider interesting about this band?  ;)
« Last Edit: April 12, 2013, 1704 UTC by R4002 »
U.S. East Coast, various HF/VHF/UHF radios/transceivers/scanners/receivers - land mobile system operator - focus on VHF/UHF and 11m


HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns