On 10 Feb 2005 14:18:13 -0800, wrote:

I need 13.8 volts dc for a 50 watt ham radio and maybe a 5 watt cp
radio. What would i need, 20 amps?

What amperage would you have? What would you want for them?


All you need is about 6 amps (55 watts/14 volts=3.9, 55/12=4.6) , so a
10 amp unit would be lots.