Hope you can help me solve a problem. I am using a 80 cm offset dish in south of UK.
With a standard satellite LNB (Visbleware VK4L) I can receive very well, for example the NB beacon shows 38 dB S:N using SDR Console.
When I use the Bamatech dual feed antenna, my RX side only achieves 28 dB on receive. (All SDR setting remaining same).
I have experimented moving the focal point +/ a few centimeters seems to make a few dB difference.
(My up-link seems to work ok - getting S6 reports with 2 Watts).
I attach photos. Wondering do I need a dielectric lens for the dual feed LNB because I am using offset dish ?
Or maybe I have a bad LNB from Bamatech?
Thanks in anticipation.