Ok, I just tried it with a 10 ohm resistor, so 340mA through the LED. It only seems to have made a very small difference to the range, and I still have to point the LED *directly* at the TV for it to work - Even a few degrees make a difference.
I will try playing with the frequency again.
Also, do you think 50% duty cycle is the best bet? I wasn't sure what to use, and 50% seemed logical, but now i'm considering a lower duty cycle as that means the LED should theoretically be able to handler a higher peak current.
*edit* My TV is a Samsung LA40R71BDX
*edit2* Fixed mistake in schematic (thanks keithdoxey)
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