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Mobile and Base Radios

A mobile radio trades the handheld's convenience for power and a real antenna. Most put out 20 to 50 watts, compared with 5 to 10 for a handheld, and they run from a vehicle's 12-volt system. On a good roof antenna, that's the difference between reaching a repeater and not.

The same radios work as a base station at home with a 13.8-volt power supply sized for the radio. Look for a detachable control head if you're mounting it in a vehicle with little dash space.

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Questions

How much power do I need in a mobile radio?

For local repeaters, 20 to 25 watts is usually plenty. 50 watts helps with distant or weak repeaters and simplex. The antenna and how high it's mounted matter as much as the wattage.

Can I use a mobile radio at home?

Yes. Run it from a regulated 13.8-volt DC power supply rated for at least the radio's transmit current, and connect it to an outdoor base antenna. The accessories page has power supplies.

Do GMRS mobile radios need a license?

Yes. Any GMRS radio needs an FCC GMRS license. It costs $35, has no exam, lasts 10 years and covers your immediate family.

Product links go to BTECH and Radioddity and are NodakMesh affiliate links: we earn a commission on orders, at no extra cost to you. Prices and stock as of October 22, 2026; the retailer's page has the current price.