A question about amperage

[decojoe67]

Originally Posted by madlabs

If your radio needs three amp and your power supply can provide 3 amps it will work but the power supply will run hot and most likely die an early death. A wiser rating would be to find a power supply that can provide at least 5 amps. The radio will run the same but the power supply will run cooler. If you had a 20 amp power supply the radio will run the same and the power supply would be essentially stone cold.

So the upshot: Once your power supply's rating exceeds the radio draw by around 20% there is no benefit to using a larger power supply. No harm will be done but your power supply will be under employed. :-)

Thanks very much. It seems I'm getting more no votes on using the ARBE III for my "A" supply with it's 3.0 only continuous amps, which is the minimum I need. I will use the ARBE for the "B" supply, and the 6V-20amp battery for the "A". This battery I have ordered is designed for prolonged use, so I think it will be fine with the limited use the set will get.