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There's a reason I sometimes refer to the area between and adjacent to Sutro and San Bruno as "Multi-path Hell" or "The Valley of Death".
KGO on Sutro is also on VHF (7). KNTV, operating on VHF-12, is behind Diamond Heights for you and its signal will be strongly affected, more so than the TVfool plot would suggest due to the short ranges to the diffracting terrain. At the same time, there's an FM station on Sutro whose 2nd harmonic falls right into VHF-12 raising a strong probability of FM inter-modulation (interference). An FM filter is strongly recommended.
Stations coming off Sutro will be substantially less powerful that TVFool suggests due to your significant angle of depression relative to the transmit antenna's primary horizontal signal lobe, probably in the order of up to 20 dB lower. The majority of their power is being pushed just below the horizontal plane with relatively modest amounts directed towards the base of the mountains that the antennas are situated on.
Your situation is one where I'd be curious if our ClearStream 5 would work. I'm curious enough that I'd be willing to send you one to try out. If you're interested, send me a Private Message (PM) with contact information and I'll set it up.
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