I was installing a new preamp on my antenna last night and started playing with the height of the antenna. The results were interesting. At a lower level I was able to pull the Houston PBS digital station at ch. 9. But the bad news was that some of the other hd channels at live in the ch 30 range became very unstable. What I'd like to do is lower the combo antenna on the mast by the amount that I found was good for ch 9 reception and then put a spare UHF Yagi at the height that I previously had the combo. Use twin lead to connect the Yagi to the combo and from the combo to the preamp as it is. Anyone out there have any experience with doing this kind of config? Does this seem sound to you? :shrug: Thanks in advance!