SBFI is running with a new 1/4 wavelength groundplane antenna, tuned to 126.725 Mhz (mid of our scan band). I didn't find any RG-213 or RG-8/X cable in my hometown, so I used RG-58U. The cable run is about 40 ft.
SNR improved considerably, as well as range.
I would like to thank Dave and the fellow feeders who alerted me on the polarization issue.