New 4-ele 40m OWA Yagi

There are few changes as compared to the first version:

1. Boom is now larger and thicker: 80x80x4 mm – 3×6000 mm. Connected together with 1.5m 90x90x4 mm sections. The central part has two tubes one over another: 80x80x4 + 90x90x4 mm – it is super-heavy and I am not sure that that is right. However, I don’t it to break and when I experience the local gusts in reality, the feeling is that nothing is enough and when I imaging a 18-meter boom on the 40-meter height, nothing can withstand those winds. But let’s hope for the best and pray all radio supporting gods :-). The tubes for the new boom were purchased and brought from Moscow. The previous boom was clearly inadequate – 50x50x2mm and purchased on the local marker (bazaar) in Almaty. The tubes were clearly inferior quality – there weren’t a square tube, it least not a welded ones … – they were 4 sided “folded paper” and one side didn’t really have and strong connection with another one – no welding, nothing. So, it unfolded under the pressure of the wind in on of the corners like nothing was holding the sides of the tube together … Overall, the boom was too thin, too low diameter, too low quality overall – I didn’t expect that such tubes even can exist. Of course, I new that it is too thin and too low size, but that was the largest I could purchase locally and I didn’t want to wait long
2. Elements have higher diameters and thicker. Starting diameter was 32x2mm and purchased locally. The new diameter: 50×4 mm, then 40×4 mm, and on then 32×2 mm. The new thick tubes also purchased in Ural – not locally
3. New taper profile. I used to have longer elements. Now, it is planned to be: