Hi Calvin (N8RFY):
The antenna you've selected looks pretty inefficient. The 1KOhm terminating resistor in the center of the wire is annotated: "...power rating in Watts should be the same as transmitter power output in Watts...". This is a bit of a clue as to where a LOT of the TX power is going - into heating the resistor rather than radiating. But I'll bet it really helps maintain the match, along with the 16:1 transformer.
Regardless, having fun experimenting and learning is good, and an antenna does not have to be particularly efficient to be useful. Please let us know how everything works out!
I recently had to do an attic (desperation) install at an HOA, where the unit had a high, peaked roof. I installed a 63-foot EFHW wire (49:1 transformer) and added a hefty CMC, feeding it with 100 feet of ABR industries LMR-240/RG-8x - pretty lossy coax. The wire is arranged in a tilted but mostly hoirizontal V.
To my major surprise, this arrangement is working very well on 10/15/20/40M, and even on 17M and 30M where the antenna is non-resonant (coax loss actually helps, here, with match), though it's pretty inefficient. No RFI at all, either, and noise level is low - very surprising
This is NOT what I expected. Of course, propagation conditions have been largely excellent.
Sometimes you get lucky.
Brian - K6BRN