RE. Silent stations and virtual channels carried by active stations, one of the most useful resources is
www.rabbitears.info. TVFool 'specializes' in predictions of real channel reception and only offers limited correlation of real vs virtual channel mapping. TV Fool makes no effort to provide a comprehensive and detailed report of all the sub-channels carried by a station.
www.rabbitears.info offers some overlap of the data that can be found at TVFool but goes much deeper into the current status of each station and the virtual channel(s) transported over the real RF channel.
The difference between the loss in RG-6 & RG-11 are about what you cite. As ADTech mentioned, losses due to cable and splitters is the job of a preamp or distribution amplifier. If you needed to run over 500' from the antenna to your house, RG-11 may be helpful. The normal cable run in a residential setting can be done with RG-6, without problems due to slope loss (high loss at high frequencies vs less loss at lower frequencies).
The Y10713 is you best shot at receiving any of the channels in the H-VHF band (real CH-7 through CH-13). There are several listed, but you'll need to aim the antenna at them to have any hope of reliable reception, which means one fixed aim antenna can't deliver all of them. Also, as you go down the list, you soon see co-channel and adjacent-channel warnings. depending on the actual severity of the interference, the weaker signals will be that much harder to get.