[Tower Guy]

Originally Posted by WildmanCAL

My antenna is a DB4 HDTV Mid Range UHF Antenna, mounted 12' on my roof, pointing roughly 316°, with only trees in blocking clear line-of-sight.

The DB4 that you have is a UHF only antenna. The stations that are unreliable are on VHF channels.

I'd add a VHF only Y10-7-13 aimed at 316° to the existing DB4 using a UVSJ splitter/joiner.

At the same time I'd play with the aiming of the DB4 to see if you can get the stations at 10° without hurting the SF reception. Start with an aim of 350° and try it.