Hi all

A very lively topic indeed. I have used a imbedded wrought 3\4" iron rod in the concrete footing which extended up for about 7 ". The top 4" was threaded. In the bottom of the timber pre drill a 1" hole as close to the location of the imbedded wrought iron rod, and about 9" in depth. drill from the side of the timber an access hole that intersects the vertical hole about 7.5" from the bottom, and then chisel out a flat shoulder on the horizontal acess hole, big enough to slide in a 3\4" nut and flat washer. After setting the post over the imbedded rod slide in the nut and washer and tighten down firmly. I suggest some type of moisture barrier between the end of the timber post and the concrete to stop moisture wicking, we used a copper sheet set over the imbedded rod.
best of luck NH