[Elecraft] K3 powers off when after several minutes of 12W carrier

[Brian Hunt]

For folks who run lots of high duty cycle modes, Elecraft is now recommending 'thermal pads' between the LPA transistors and the bottom cover. I found this out when I was doing some mods to my 10yo K3 and the instructions said to install them and I didn't have 'em. You can get them from Elecraft, not expensive. 

73,
Brian, K0DTJ