Total posts : 45366
3X the antenna, almost ten times the field strength. I noted from Madmage’s article that 5/8 wave is the most efficient vertical. He also mentions, and the chart shows, that field strength falls off rapidly when using a radiator less than .1 wavelength.
If a quarterwave is about 142 feet at 1650, then .1 wavelength is 57 feet, according to my calculations. That could be the reason 50 feet was chosen for TIS total antenna length, something long enough before efficiency took too much of a dive.