Well, quite truthfully, it was coincidence. I ordered two 100 foot rolls of #26 wire. One measured 101.5 feet and the other about a foot longer. I cut the longer one to match the other, so they both equalled 101.5 feet. A bakers dozen I figured.
This length formed the basis of the MiniBAC antenna I wanted to build. Along the way I wanted to build a 130 foot or so quad loop for Field Day so I had to cut down the two wires to somewhere around 65 feet a piece and join them in the middle at the top. As I was about to cut the wires I realized that my pole being 36.5 feet extended would allow my rig to be about a half a foot off the ground to keep the jewelry clasps from binding up in the S-Biners at the apex in doublet mode. This was back before I realized the importance of stressing the pole.
So, as I cut only 36 feet off the ends, what was left was 65.5 feet per leg.
Now these jewelry clasps are kinda neat. I can use male/female pairs to join sections of wire together mechanically as well as electrically. They are made of Sterling Silver and can be found at Hobby Lobby.
So there you go a full-sized 101.5' per leg MiniBAC or a shortened version, a 65.5' per leg version. When the shortened version is deployed on my stressed 36.5' mast, the apex clips end up at midpoint making for a 32.75' radiator and equal riser Tx line. Hmm, a 40m doublet.