Channel 38 - Lower Side Band (Phoenix, AZ) from Staff's blog
38 LSB is a Citizens Band (CB) radio channel that uses lower sideband (LSB).
Explanation: LSB is a range of frequencies below 27.185 MHz on a CB radio. Channel 38 is
one of the channels that use LSB SSB operation.
Calling channels: Channels 36 and 38 are unofficial SSB "calling channels" that stations use to find contacts. After making contact, conversations move to channels 37–40.
AM-only radios: CBers with AM-only radios should not use channels 36–40.
CB RADIOS ON AMAZON - CB RADIOS ON EBAY
The radios found at the above links all allow for SSB operation.
The Wall