[Shred]

Thanks for sharing this modification. Have you actually measured the current used by the modified TX board? (You knew someone would ask, didn't you!).

I've been tempted to use one of the Traco Power switching regulators. They are not cheap at around AU$ 10.00 each, but they're a drop-in, high efficiency replacement for the 78xx regulators.

http://au.rs-online.com/web/p/switching-...s/8179413/