it's probably a flat scalar ring and is for maximizing signal quality and attenuating undesired interference
Dielectric plates are used to convert circularly polarised signals to linear polarisation. They work by utilising the difference in dielectric constant between fibreglass (or teflon) and air.plate_dsc_0330.jpg
The emp comes from the high nearby voltage generating an emf in your coax that causes a voltage spike at both ends of the cable. I had this same problem but the gas surge suppressors worked for me. I have bought 3 chinese c band lnbs, and all 3 only work on 1 polarity. If your curious about building an emp cage it's called a faraday cage.
I'm going to see if I can build something like posted. My dad just called and he lost Metv at home. But I'm sure it's just the dish is a little out of alignment. All the other channels work. I really need to hire someone to point his dishes.
So I got the new lnb up at the lake but I can’t get some transponders. The ones that don’t work are of course and I the ones I want. 3725, 3733,3744, 3748, and 3764. The lnb manual says it works from 3.7ghz up to 4.2ghz. Low frequency 5150 and high 5750. Any tricks?
You are right! I’m not getting any vertical transponders. Do I just need to rotate the lnb?
It’s a cheap Chinese one but it should work.
So I rotated the lnb and now I only get the vertical transponders. I’m using a Freesat V8 super. I either get a high signal on vertical or a high signal on horizontal. Am I missing something?