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I want to wire up a UHF radio (car unit) for home use. I can get a generic plug in the wall adaptor that will output the voltage I need for like <$5 on ebay (pictured). I know I need 12 volts, but my question is about amps.
The unit has a 3 amp fuse, so that means I want less than 3 amps doesn't it? Because 3 amps will blow the fuse? So I should be looking for a 12V, 2A adapter shouldn't I?
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what happens, if your radio needs to draw 2.5A to operate, but your power supply is only rated at 2A?
>inb4 probably nothing
your power supply will get warm, overheat, and (eventually) die. Your radio is fused at 3A becuase thats how much it needs - the 3A is the lowest-rated fuse at which it will operate before a problem (eg short-circuit) means it will attempt to draw more than 3A, and the fuse will blow, protecting the Unit.
So, having said all that, what you need is same or higher power supply, eg, 3A or more, less is bad. More is actually better, bit of overhead is good - the radio will only draw what it needs, and, in the event of a problem, the fuse will blow at three amps.
tldr - over-spec power supplies, not under - device rated at 3A? = power supply 3A or greater, less is bad.
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>>1048436
Neato, thanks.
However it does say in the manual
"Over current protection - 2 Amp fuse"
Which I thought was odd that it would say 2 Amp FUSE rather than just 2 Amp, since it has a 3A fuse.
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>>1048409
it wont draw more current than it needs. if it needs 3 amps, get 3 or more.
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>>1048409
>UHF radio
Make? Model?
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