Hi, Jim:
Does your tvfool report look something like this?
http://www.tvfool.com/?option=com_wr...dfafdaa47b9bbb
The transmitters at 8.1 mi are called translators (a repeater on a different frequency) to cover your area for the main transmitters that are 44 miles away.
K32DY is the translator for KOBI
http://www.rabbitears.info/market.ph...callsign=k32dy
K47LD is the translator for KTVL
http://www.rabbitears.info/market.ph...callsign=k47ld
KSYS has two transmitters, one on real channel 8 and one on real channel 42, both with the virtual channel number 8.1.
http://www.rabbitears.info/market.ph...&callsign=ksys
K21BG is the translator for KDRV
http://www.rabbitears.info/market.ph...callsign=k21bg
It is the real channel number that determines what antenna is needed.
VHF-Low, real channels 2-6
VHF-High, real channels 7-13
UHF, real channels 14-51
The virtual channel number (like 5.1) is a holdover from the analog TV days to maintain the identity of the station, and is what the TV displays.