The long-term plan here is to build a competitive SO2R station. That will likely happen in a number of phases. The two major steps are:

  • Erecting the small tower, likely to hold secondary antennas and probably fixed south options for the high bands. (See removal of this tower from the previous QTH)
  • Erecting the "big" tower. This will be 100' of Rohn 45G, pre-engineered.
Designing anything for SO2R is extremely difficult in that both radios need access to all antennas, and need to be locked out from selecting antennas in use. Both sides also need filtering, usually on the high power side (past the amp) as well as between the amp and exciter to knock down any nasty products.
Another level of complexity is unlocked with tribanders. The issue there is that a radio using a tribander on 10 prevents the other radio from being on 20 or 15, unless it has access to additional "secondary" antennas; such a problem defeats the purpose of SO2R or 2BSIQ for most of the daylight hours! This problem can be solved with triplexers, now available from many sources, but that requires additional filtering and, of course, three stackmatches instead of one.
The intermediate option, of course, is a single stackmatch between the triplexers and the beam, but that means (for example) the left radio can't use just the top antenna for JA's on 15 while the right radio runs EU on 20. It isn't ideal, but it may be one of the steps in this evolution.
As of today, my plan is below. I will post updates as things evolve, and I'm sure they will.