How to find amperage for a/c input for Aiwa HS-TX656 portable cassette player. (1 Viewer)

[John Pine]

The case of the unit only states voltage (3V) and the tip polarity (-) that should be used for an A/C adapter. The unit is a pocket size, and uses two AA batteries. I would like to use a 500ma multi-volt A/C adapter I have. Do you think this would be too high? A friend suggested 300ma instead. Any feedback?

 

[Seth_L]

Too high shouldn't matter. Too low would.

 

[John Pine]

Seth: I don't know jack about amperage or voltage. Why would "Too high", not matter?

 

[Craig F]

The cassette player consumes power. If the amperage is too low, there is not enough power to drive the device.

The amperage rating on the supply is what the supply can drive. So if it's higher than the device needs, so what? The device will not consume more power because the supply can deliver it.

 

[John Pine]

Craig: I thought too high an amperage rating might damage the player. So I could use a 1000ma adapter (set to 3V) and it wouldn't matter? As long as the voltage is correct, right?

 

[Craig F]

Correct. The only time the extra amperage would be drawn, is if the player got a short. Then it will draw as much current as the adapter will supply. If the adapter can supply a lot of current, more damage could happen to the player.