Can you talk to a marine radio with cb radio?

In general, it is not possible to communicate between a standard marine radio and a CB radio directly, as they operate on different frequencies and use different modulation techniques. Marine radios typically operate in the VHF (Very High Frequency) band and use Frequency Modulation (FM), while CB radios operate in the HF (High Frequency) band and use Amplitude Modulation (AM). To communicate between a marine radio and a CB radio, you will need to use a device called an "intercom" or "interface" that is specifically designed to convert the signals between the two types of radios. This device will typically connect to both radios via audio cables, and may also require an external power source.

Here is a general guide on how to connect a marine radio to a CB radio using an intercom:

Power on both the marine radio and the CB radio.

Adjust the volume and squelch settings on both radios to comfortable levels.

Connect the audio cables from the intercom to the appropriate input and output jacks on the marine radio and CB radio. Typically, the intercom will have two cables, one for transmitting and one for receiving. Make sure to match the cable colors to the corresponding jacks on the radios.

Turn on the intercom and adjust the volume and gain controls as needed.

Use the intercom's PTT (Push-to-Talk) switch to transmit from one radio to the other.

You should now be able to communicate between the marine radio and the CB radio.

In addition to the intercom, you may also need an additional antenna or antenna coupler, especially if you are operating in a remote location or if the signal is weak. An antenna or antenna coupler can improve the signal strength and allow for better communication.

It's important to note that using an intercom to connect a marine radio and a CB radio may affect the performance of both radios, and may not be suitable for all situations. It's recommended to check with the user manuals or consult a professional for guidance on the best way to connect the radios based on your specific setup.