[rabbit73]

To the North is a) CBOT 25 CBC, b) CIII 14 Global c)CJOH 13 CTV d) CICO 24 TVO.

Those are fairly strong and in the same direction. The Winegard HD7694P is suitable.

The 2 antennas mentioned the Antennas Direct C2V and the Winegard is one preferable as far as superior TV reception / quality

The 7694 has more gain on VHF-High than the "V" dipole of the C2V for real channels 13 and 7.

To the South (I'd love all of ABC, NBC,CBS, FOX, PBS) will realistically attempt for a) WWNY 7 CBS (FOX) I doubt but would like b) WWTI 21 ABC c) WPBS 41 PBS

That will be a little more difficult, as rickbb said.
It is possible to remove the reflector to make an antenna bi-directional, but the DB4e and DB8e are UHF antennas not optimum for VHF-High channels like 7 and 13.

How would I attempt receiving both North and South signals? I've read this (http://www.tvantenna.com/support/tut...combining.html)

The Jointenna is no longer available, and you would need more than one.

and a few other articles and it seems 2 directional antenna's would be best since the difficulty of getting electricity to the antenna tower for a rotator..and use an A/B antenna switch ....

I favor the two antenna approach, but your tuner must be able to add a channel after a scan like my Sony, otherwise you would need to rescan after every antenna change, but there are ways around that.

then purchase a second Winegard HD7694P antenna

Your plan is a little more ambitious than I thought it would be. I suggest a bigger VHF/UHF combo antenna like the Winegard HD7697P or 7698 with more gain for the south, and a Channel Master 7778 preamp.

since the difficulty of getting electricity to the antenna tower for a rotator.

Yeah, there are problems with a rotator, like who wants to wait while it swings around, who gets to decide which direction, and who wants to repair it in January?

Will I benefit from a preamplifier?

You will certainly need it for the south, and it might help with the north antenna if your coax run is 90 feet to the house before splitting.

You can see that there isn't much WWNY signal left by the time it reaches your antenna:



And the curvature of the earth blocks the WWNY signal, but VHF signals can diffract over peaks a little better than UHF signals: