dc - ac

How many amps?

It is 12 volts ac 2.5 amps - and i want to power it with an rc car battery rated at 9.6 volts dc 700 mAh, or i could use my other rc car battery which is 9.6 volts dc 1100 mAh.

Thanks for responding

Josh,

You are not going to find parts for this around your house.

You should be able to find a screw driver, though. Use this to open up the device you are trying to power, and figure out what happens to the original 12V AC. You may find that there is one place in the circuit that will accept a DC voltage, to function normally.

Once you know what this voltage is, you can develop a battery source to provide it, fairly easily.

RL

Great - i will look into that. Thank you so much for your help.

Nothing's ever this easy. What if the device uses a half-wave rectifier to generate a bipolar supply from the AC?

Well, lets ask the OP, Hey OP do you have/know what a volt meter is ??

The OP doesn't have a clue. And this is really for s.e.repair anyway.

Yes i do, i have one and have used it many times on many things. I tried opening the trans. but unfortunately the plastic casing is sealed - so there is no way to open it without damage.

All i am trying to do is find a cheaper source of converting dc to ac

I just dont want to destroy something that works perfectly fine, and i dont feel like getting a battery in my face either. whats really strange is that my friend took an ac powered subwoofer and put a 9 volt battery on it to power it. It must be such a low battery amperage that it doesnt cause an immediate problem - but his battery life sucks horrendously.

I have decided to just buy a car stereo amplifier to do this job. Thanks for everyones help and ideas

Forget it. Won't work.

For audio?

with a 2.5A input it's maximum 30W dissipation, so probably under 15W output,

You'd not know without looking.

A number of popular commercial audio IC's develop two out-of phase outputs from a loosely regulated single supply rail.

Even more common is a single output that is capacitively coupled to the loudspeaker.

Devices that are intended for portability or battery operation are more likely to have more efficient amplifier circuits - switch-mode amplifiers or the like, with the same single or two-phase arrangement.

RL