In many cases there is also a "headset" jack, and inserting a headphone or headset will disconnect the internal speaker.
R/C indicated frequencies used for radio control and industrial purposes.
The Citizens Band Radio Service (CBRS) is a private, two-way, short-distance voice communications service for personal or business activities of the general public. It is authorized 40 channels between 26.965 MHz and 27.405 MHz.
Similar service includes the General Mobile Radio Service (GMRS).
Here in this list, we document the best and most common Single Side Band (SSB, USB, LSB) Freeband frequencies useful for Survivalists.
We cover mainly SSB because it is by far the best method.
The original source of this article is the Radio Master Reports blog.
About Freeband Freeband refers to unlicensed transmitting on the frequencies above, below, and in between normal HF radio bands.
Freebanding is communicating on the freeband frequencies.
CB radios and HAM radios can be modified to get freeband channels.
It has lost its popularity in the 21st century due to the influx of modern communication devices.
You can still have a valid communication system between a group of pals or for emergency contact using CB radio.