Here is an update
I deployed the Antennas Direct 91XG + AntennaCraft Y10713 at temporary locations
on the roof. Boresight 91XG at hill ridge towards Sutro Tower.
Reception improved compared to the old RS yagi.
There are fewer intermittant dropouts. I can receive all of my must have channels when
conditions are good. KTVU (RF 44) remains a challenge. Most of the remaining dropsouts
on KTVU.
To make more progress, I need a better way to measure signal quality.
Accessing the Samsung TV Signal Strength screen is awkward.
I appreciate the wealth of information offered in this forum.