I have a TRF510, but I was unable to get it to work. I'm really not sure how to read mosfets. It says the gate threshold voltage is from 2v to 4v. I'm assuming this means at least 2 volts is required to turn the mosfet on. In my current setup the PIC is powered by a 3 volts, so shouldn't this be sufficient to turn it off? Perhaps I unknowingly fried it previously.