[dmfdmf]

Originally Posted by stvcmty

You should try a vertically polarized FM antenna. KSAN has 8.9 kW ERP horizontal and 8.9 kW ERP vertical. KSAN-FM1 has 0.185 kW ERP horizontal and 0 kW ERP vertical according to the FCC database. Other than signal cross polarized by bouncing off stuff, the booster should not be doing anything vertically polarized.

I think this is my strategy now.

KITS is a bit more of a mess. The FCC database shows 4 boosters for it. Of those, 1, 2 and 3 are all only horizontally polarized. KITS-FM4 is vertically polarized. KITS-FM4 does not show up on your plot, and looking at the power spectrum at the bottom of the plot, it is probably below -100 dBm at your location.

But similar to KSAN, KITS main tower broadcasts both H & V polarizations and all the booster stations are H polarization except FM-4 out of Antioch which is V polarized and not showing up on my FM Fool report so probably not a source of interference.

So, if I were you, I would get the channelmaster vertical FM Yagi and a section of fiberglass mast, put it up on the roof, point it at 337 degrees True, and see what happens.

http://www.hamuniverse.com/vertbazooka.html

I think I might build something like this Bazooka antenna as a test. I can tune the lengths to 106.5 MHz (half way between my problem stations) and see if a vertical antenna cuts the static. The design uses RG-8U cable but I only have RG-6 cable do you think that would impact the design much? Also, the guy says this has 55-60 ohms impedance (assuming RG-8U) so if I made it out of RG-6 would that make the impedance worse or better for the 75 ohm down lead cable? I am assuming an impedance miss match of 60 ohm into 75 Ohm would just impact the efficiency and there is plenty of signal in my area so it won't kill the reception. Also, the input to the tuner is 300 Ohm so I have a balun on the receiver end already.