DIY USB Guitar Cord

[brodie65708]

Hi. I know they are cheap but I am trying to learn about electronics and get practice building my own gear.
My question is: How would I go about...

[Jaxn]

Ive got one of those new usb turntables to repair for a friend (he decided to force the US 120VAC plug into our Australian 240VAC), and it will be easy enough...