Scanner radio works with wrong power supply?

[Gulfstreme]

My radio scanner didn't come with an ac adapter so I'm using one that
I had lying around (and that fits the plug) and it seems to be working
fine even though the voltages and amperages are different (see below).

scanner input - 9v dc 300mA
wall-wart output - 6.5v dc 2.5A

Could someone explain how/why this works? It seems to me that 2.5
amps would be too much since the input calls for 300mA. Is the 2.5A
wall wart putting out *up to* 2.5A depending on the draw from whatever
is hooked up to it? Is the 6.5 volts just *enough* to power up and
use the scanner? I've just been wondering about this for a while
now.. thanks for your replies.


BTW: the scanner is a Radio Shack Pro-95

 

[AC/DCdude17]

X-No-Archive: Yes

Gulfstreme wrote:

My radio scanner didn't come with an ac adapter so I'm using one that
I had lying around (and that fits the plug) and it seems to be working
fine even though the voltages and amperages are different (see below).

scanner input - 9v dc 300mA
wall-wart output - 6.5v dc 2.5A

I bet the 2.5A 6.5V DC wall-wart puts out about 9V when you're only
drawing 300mA. It puts out 6.5V when it is under 2.5A of load.



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