scott wrote:You might've fared better if you told him you wanted to buy a power transformer. That's all you're looking for, right, a step-down transformer? Out of curiosity, what do you need 9VAC for?

Alesis and Lexicon often need 9vAC, and no, "step-down transformer" almost exclusively means a 240v-110v supply in the UK. But I don't credit someone who fails to grasp AC being different from DC with the ability to know the difference between a step-down and a step ladder, he would probably have suggested a hardware store.

benadrian wrote:
4. ???

I think it's to supply a + and a - dc voltage using the standard two conductor power connectors on most wall warts.

That's how it looks on my small modular synth anyways.

hbc wrote:

benadrian wrote:
4. ???

I think it's to supply a + and a - dc voltage using the standard two conductor power connectors on most wall warts.

That's how it looks on my small modular synth anyways.

Except the whole discussion has been about AC power supplies, not DC.

endofanera wrote:

hbc wrote:

benadrian wrote:
4. ???

I think it's to supply a + and a - dc voltage using the standard two conductor power connectors on most wall warts.

That's how it looks on my small modular synth anyways.

Except the whole discussion has been about AC power supplies, not DC.

Pretty much any device that takes in AC will convert it to DC. An AC input can be converted in a device pretty easily into multiple positive and negative DC supplies. If the device takes a DC input, it can only reduce the positive voltage, in lossy, inefficient ways.

Ben