simple power supply question

[The Tasmanian]

Hi Gents,
I just bought a MAM vocoder from the US with a external wall wart - AC 12 volt 500ma 110 volt power supply.
I want to purchase a 240 volt power supply to avoid using a step down transformer.
The question I have is - do all power supply's have the positive on the center pin of the plug that goes into the unit?
I dont want to cook this box by having the positive and negative reversed
any help would be much appreciated

[Gian]

You stated that it was 12V AC, alternating current (sine wave), so there is no positive and negative. So when you get the 12 V australian one, make sure it is AC and not DC - some wall wart units that are DC have positive in the centre and some have negative. But yours (from what you stated) is AC. Hope that helps.

[The Tasmanian]

Just to be 100% sure of what I am asking - the existing wall wart says:
Input 120v AC 60hz 16.5W
Output 12VAC 1000ma

So any 12 volt AC power supply in AU will work?
Thanks Gian

As you can tell I have zero experience with electronics - only using/abusing it to make music

[Ben M]

http://www.altronics.com.au/index.asp?a ... &id=M9267A

If your looking for one Chris. This might be useful.
All the best
Ben

[mylesgm]

That seems correct Chris but if you are unsure then take the wall wart to jaycar and say I want something to replace this and they should sort you out.

[rob]

that altronics one is correct. No polarity issues for AC secondary plug packs.

[The Tasmanian]

Thanks
You guys are Gentlemen!

[Futureman]

Hey Chris.

Let me know when you fire it up... I'm interested in what you think of it.

Personally, I love it.. it can tear your speakers apart.. or can be nice and tame / ELO / Air.

And the white noise unvoiced bit is nasty.

Regards
Mike

[The Tasmanian]

Thanks for the speaker tip Mike - so glad i modded all my monitors to have fuses.
After cooking so many tweeters with my Neve Teledistorts I got wise.
Really looking forward to this box for some creative manipulation and abuse - and running it through the teledistorts!