If only I'd used a usb ammeter to verify I was getting a lot more than 500mA.
Oh, hang on - I did.
Edit: nobody's suggesting you can use any old usb hub.
The '500mA per port!" doesn't apply to the connection between the hub and pc btw.
According to the USB specs a hub should not feed any power back to the computer via the USB interconnect cable.
But these hubs take a walk on the wild side.
I am glad you did and you seem to know what you are doing but does everybody else ???
Is everybody else who is complaining about not being able to charge at 1.4A (that's the max the Linx7 can handle) using the same Hub or cable?
You are aware of, that different cables can handle different currents right... I know you do... but does everybody else know?
Does everyone use a usb ammeter to measure the current between the hub and the tablet?
Are they using different cables that are capable of 1,4 or more Ampere?
If you are using the right (out of specs) Hub and the right Cable (capable of 2A) and measure full load (1,x to 2,x ampere depending on what battery you have) while you have nothing else connected on the Hub (just the tablet), then you can try a 3A or more power adapter.
If not, then the power adapter is not your problem!!!