Lot's to chew on! Yes, you can run two antennas for each band, but the whole point of that tuner is that it has a bypass switch which allows you to adjust the antenna for one band and use it there, and use the tuner to tune it for the other. You simply switch the bypass switch in or out.
For example, in my case I use a Larsen NMO34 antenna with The 65" whip (equivalent to a Wilson 1000) tuned to 28.800 Mhz. I use it in the "bypass" mode (tuner out of circuit). For 11M, I switch in the bypass switch which puts the tuner in circuit. I pre-tune the tuner for let's say 27.200 Mhz. For 11M, I use the tuner, for 10M I switch it out.
You tune the tuner once only. Once set, you can forget it.
Antennas: Go for the longest possible within it's design. For a base loaded antenna such as the Wilson 1000, or the Larsens, go for the longest whips, typically giving you a 70" antenna. For a helical, I would go for nothing less than a 6 footer, 7 feet being better. A four foot helical has poor performance in my opinion, and it's too narrow band. An alternative is one of those "big coil" antennas. They work well on pick-up trucks; they are typically about 5' long or so.
Since you are using an "export" radio running comparatively high power you will need a high-drive amp. Don't fart around, go for a 4-pill job. I recommend the Texas Star DX500. It uses four 2SC2879 transistors, and will give you up to approximately 600W out depending on drive. Since it's a true Class AB amp, the output is directly proportional to the input. 10W drive will produce about 200W output. The approximate 15W AM drive of the OPTIMA will produce about 200W output. The 50W PEP input should drive the amp to full output. At 50W you will overdrive the amp, so turn down the power.
I absolutely do not recommend any low-drive amps, whatsoever, even when driven by a 4W CB. They are, for the most part, junk.
