I tried the dual brush several times to see if I could get this effect, but I couldn't get it to work. If you could share a step-by-step, I'd very much like to see.
You can also approximate the look with a brush that has the dash and dot, but angle jitter won't bend the brush, only rotate it, so you wind up with a sort of faceted line. At least, that was the behavior last time I tried it, but that may have been as far back as version 7.0. In any case, I'd still rather do this kind of thing in Illustrator than PS.