https://www.google.com/search?q=UVSJ+antenna+amplifier
Guessing it's UHF-VHF summing junction - obvious, eh?
A common recommendation here is the RCA preamp
http://www.amazon.com/RCA-TVPRAMP1R-.../dp/B003P92D9Y ... the passive junction is lossy, ie it will cause some signal amplitude loss. If you have signal to burn, then that does not matter.
When both DB8e panels are pointed in the same direction, the antenna is maximally directional and also has maximum gain. When you spread the panels, you lose some gain on any one axis, but the directionality also becomes less. Whether the integral gain (the sum of gain across all possible directions, sort of a gain-direction product, if there is such a thing) is any less, I do not know.
Shoot, I wish you'd use the real channel numbers or the call signs or ideally both, rather than the old NTSC numbers, if that's what you think you are using. It would make following your questions easier.