Hi @kannans Kannan!
Sorry for the late answer. The manual of the TA-1 says: Stay away at least 2-Meters from metallic material. For testing i removed everything and mounted the TA-1 on top. Only one dipole leg is ending there.
I am awaiting my Winkler crossed dipole for 435 MHz. So I plan to mount it with a sidearm or on the running rail.
Have a look at my setup report. My actual groundstation is also linked there:
73 Oliver