Very heavy SSB activity on the following legal CB channels:
Channel 37 - 27.375 MHz LSB 37LSB or 27375 LSB
Channel 38 - 27.385 MHz LSB 38LSB or 27385 LSB - Primary North American SSB CB DX Calling Frequency Channel
Channel 39 - 27.395 MHz LSB 39LSB or 27395 LSB
Channel 40 - 27.405 MHz LSB 40LSB or 27405 LSB - often hear AM activity on channel 40, but strong SSB signals were punching through the AM QRM this afternoon between 1800 and 2000 UTC.