The Cushcraft D40 rotatable dipole is a great antenna – and its the same element they use on their 40M yagi. Because it uses coils and cap hats instead of traps, it fairly efficient for a shortened antenna.
One way to really make this antenna sing is to add 30M. It can be done very easily by simply adding a wire below using standoff insulators of some sort – like these electric fence standoffs:
If the feed gets tricky as a “fan dipole”, then use 2 feeds. No big deal.
I can already see the bottom of the cycle starting at the end of 2018, and I fully anticipate that after 3Y0Z, my use of any high band antennas will be a waste of time. All of what I will be doing will be on 160 – 30M. Glorioso won’t be activated until at least a year after it is announced, and there is nothing in the rumor mill regarding that – so even if it were announced today, we would be very much at the bottom of the cycle. I fully expect that I would need to use a remote or someone elses super contest station.
Furthermore, there is a very good chance that I will be very seriously planning my retirement move before the peak of solar cycle 25, so, after 3Y0Z and 7 more QSOs on 160M I enter what I consider “very casual DXing” and the last throes of DXing from Orinda.
I love 40M, and when 30M is open and behaves like 40M, the same applies. I don’t even know if I will bother chasing anything on 160 or 80 after I make DXCC on 160 – my interest is starting to wane on it – this QTH is just a tough bugger and if I don’t get a surprise – like working EU on Top Band soon – my interest will fade for sure.
But I could be very happy just goofing around on 40 and 30M until I retire and move, and in my retirement I will probably also just goof around.
My definition of goofing around is use the radio like people watch TV, and build stuff and read “living history” books.