It doesn’t matter how the antenna is mounted , either X or + .
The best way to find out where a conductive crossboom passes the antenna is to make simulation with NEC , within the software you can adapt the length/diameter/position of the crossboom and find the spot where the interaction is less .
An advantage of mounting the antenna in + configuration that you can start from a V/H polarized antenna and can use this polarizations as well . An X mounted is more complex to achieve V/H , but then the X has the advantage of having all possible polarizations such as : V/H/-45/+45° .
Best regards,
Kenny ON4DPX
Van: K4IDC via AMSAT-BB [mailto:amsat-bb@amsat.org] Verzonden: zondag 10 september 2023 23:54 Aan: AMSAT-BB amsat-bb@amsat.org Onderwerp: [AMSAT-BB] Cross Polarized Yagi: X or +
I'm new to this mode..
I was advised by someone I think is knowledgeable, and certainly more so than me, to orient my cross polarized 2m Yagi so that the elements resemble an X rather than a +. Easily enough done...what's the advantage?
It's my understanding that the two sets of elements are out of phase by 90° & combined at the common feed point to emulate circular polarization. How does the rotation along the boom axis make a difference?
Seeking understanding...
Thanks,
Robin Midgett K4IDC