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« on: June 11, 2019, 1241 UTC »
Did some quick 11m band scanning this morning on the way to work (receiver is a Superstar 3900, older style version with Hustler IC-100 mag-mount antenna). Noticed the usual in-band activity as well as what appeared to be semi-local two-way comms on 25.835 MHz AM (channel 19 on band A, or channel 19 down three bands on the de facto standard 6-band export frequency or channel plan).
Anyway...
Hearing some trucker communications / truck to truck chatter on 25835 AM this morning. Talking about moving loads up to a meeting point or distribution point. Two OMs with roger beeps. No echo noted, but strong AM modulation and rapid fading up and down (indicating that they're moving).
De facto standard 6 band export 11 meter (10 meter) radio channel plan. Band D is the CB band (or the mid band 26.965 MHz to 27.405 MHz), Band C is the low band (26.515 MHz to 26.955 MHz), band E is the high band (27.415 MHz to 27.855 MHz). Band B is the low-low band (26.065 MHz to 26.505 MHz) and Band A is the super-low band (25.615 MHz to 26.055 MHz). So if the CB band is band D, channel 19 is 27.185 MHz, down one band is 26.735 MHz (band C), down two bands is 26.285 MHz (band B), down three bands is 25.835 MHz (band A). This is the standard 6-band / 240 channel export radio channel plan. Up one band would be 27.635 MHz (band E) and up to bands would be 28.085 MHz (band F). One "band" is 0.450 MHz / 450 kHz. Truckers love to flip the band switch up or down to find a clear frequency, instead of touching the channel knob, its easier to leave the channel setting where it is, and simply flip the band switch. Because of this, the common trucker channels on the various A-B-C-D-E-F bands are popular places for AM activity during band openings. Channel 19 is the obvious starting point, but channels 14, 15, 16, 17, 18, 20, 21, 22, 23, etc. are also popular. I've noted trucker comms on 26.775 MHz (channel 22 down one band), 27.535 MHz (channel 11 up one band), 27.605 MHz (channel 15 up one band), but 27.615 MHz, 27.625 MHz and 27.635 MHz are all very popular (channels 17, 18 and 19 up one band).
Maybe this is the beginning of another band opening (yesterday I heard what sounded like several different business or trucking company comms on various 26 MHz frequencies in Band B (26.065 MHz to 26.505 MHz) and on the high channels (Band E), including 26.325 MHz, 26.365 MHz, 26.375 MHz, 26.405 MHz, as well as 27.585 MHz, 27.655 MHz, 27.755 MHz and 27.775 MHz, all AM mode.
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