Dave, I'm wondering...we used to make fluidic gates and switches by carving soap bars. (To learn how they worked, not to make machines.) A foot of one inch copper tubing, six inches of 1/16" tubing penetrating the sidewall and then angled down inside, solder the two together...and I think you'd have a ten dollar venturi fitting. Hook the condensate to the little tube, drain to the big one, make sure the venturi tube is pointed downstream not up and away it goes. Add the check valve as they do for security, and it still is a $20 part.
Could be worth an experiment for someone with AC and a couple of bits of pipe. Venturis might be rocket science, but at least there are no explosives involved in this kind.[g]