I changed the subject to make this a bit easier to follow. I got the whip for 10-40 m operation ...............................It's even taller than Dan -)
https://www.alphaantenna.com/product/alpha-ss34-foot-stainless-steel-whip/
Alpha makes a 34' 6" whip (10.5 m for those of the Metric Persuasion) that collapses to ~30 inches (0.75 m). I own one, and it is solidly built. Alpha recommends guying at the 17 foot (~5 m) level, but they have the guy attachments built in to the whip. 1/4 wave at 40 m is pretty good. Of course, Alpha has all sorts of mounting and matching options. Is it heavy? Well, it is a bit heavier than the 17 and 25 foot whips, but it weighs 3 lbs versus say 2 lbs for the other shorter whips.
This is a new product for them, and I am already a fan. The price is a little more than the shorter whips but is reasonable for what you receive.
73 de Lee KX4TT
Lee KX4TT