I did a comparison of four LNBs on my new TD88 in Helsinki looking at 28.2E. I don't have a satellite meter so I'm just going by what the receiver shows.
The LNBs I tested where a new Inverto Black Ultra Single, a two year old Inverto Black Ultra twin, a new Inverto Black Ultra Quad, and a new Opticum LQP-04H Quad (as recommended by members on the Spanish threads - thanks).
Below is a table with the results from the transponders I can receive as shown by the quality reading in dB on my DrHD...
LNB Comparisons - IBU Single, Twin, Quad & Opticum Quad
The LNBs I tested where a new Inverto Black Ultra Single, a two year old Inverto Black Ultra twin, a new Inverto Black Ultra Quad, and a new Opticum LQP-04H Quad (as recommended by members on the Spanish threads - thanks).
Below is a table with the results from the transponders I can receive as shown by the quality reading in dB on my DrHD...
LNB Comparisons - IBU Single, Twin, Quad & Opticum Quad