leave Tx on with ant. down..why does this matter??
SpaceClam it's not the voltage, it's the power. It all goes into heat, which will kill an RF transistor. The only way to tell if you damaged it or not is to charge your battery plug it in turn it on and see if it works. Heat will always shorten the life of electrical components, it shouldn't outright kill it, but don't do it often. If it did manage to burn out the RF amplifier then you can have it replaced.