On 12/25/2014 2:17 PM, Mike Sanders wrote: > > Saw a heatsink on Ebay for the KX3. Does anyone know if these will > stabilize the frequency enough for WSPR use? Thanks for any input. > 73, Mike KØAZ I've used my KX3 on WSPR with the stock heatsink. As long as I keep power low, the drift is quite tolerable. (like -2 to +2) thanks much and 73, ben