TL;DR: I bought an 18" DirecTV dish, mounted the Maverick LNB on it, setup the dish inside my house pointing out through the wall, and got better than +0dB SNR.
I bought an 18" DirecTV dish to experiment with (from ebay, new-old-stock I assume). I watched the YouTube video that Konrad linked a while back (link) and decided to give it a whirl.
The dish is advertised as 18", and what I received was vertically oblong… about 18" wide, and 21" tall. The LNB bracket I ordered had the same “sweep back” angle as the LNB that came with the dish (the DirecTV LNB is circular polarized, which can work with slightly reduced signal output: See this thread Circularly polarized LNB for reception?). To start with, I chose to use the linear Maverick LNB supplied with the DC kit.
The height that the new bracket would hold the Maverick LNB was within an inch or so or the DirecTV LNB placement, so I decided to just go for it without doing the more exact LNB replacement/alignment shown in the YouTube link above.
For reference, with a bare LNB mounted outside on a 2nd story window, I average between -10 and -13dB over a 24 hr period, with an RSSI of about -79dB. I am located in Central VA.
At first I tried the dish setup outside, ground level, aimed between two big trees. Since the dish is small, the narrowing of focus isn’t bad at all. I had it aimed in short order. I was getting +6dB SNR without trying too hard.
Then I moved to my unfinished attic (3rd story). Shooting partially through a double-glazed window, and partially through exterior sheathing (and vinyl siding) I was getting in the -6dB range.
Then I moved the setup to an upstairs room (2nd story). I remembered I had achieved lock and data transfer with a bare LNB while inside, pointing straight at the outside wall of the room (so, drywall, insulation, sheathing, vinyl siding) but it was really hit or miss. I decided to try with the dish setup. After tweaking the dish elevation a little bit, as the foot for the dish sunk into the carpet some, I was shocked. Better than +0dB SNR, and -74dB RSSI.
I will log data and monitor performance during periods of bad weather. As this is an “extra” room in my house, and is rarely used, having an 18" dish in the far corner, barely visible above the couch… just seems like a win-win. Someone in a similar situation with a closet on the correct outside wall (facing SES-2 or whichever covers your region) could have an invisible installation. Perfect for persons living in a neighborhood with an over-reaching HOA, etc.
I know using a dish is not the use-case for Othernet. I don’t know if an 18" dish inside the walls of your own home is considered stealthy or not. But for some use-cases, this seems great.
Side note on the LNB bracket positioning. I did try moving the bracket in closer to the dish by about 1", where I projected it should be based on visual cues from the DirecTV LNB. I encountered worse performance by a few dB, so I just left the bracket mounted in the pre-existing hole and seemed to have about optimal performance. I was going solely on the outer plastic radome of each LNB… could be the depth of the actual feed-points between the two LNBs matched up closer than their radomes. Just a guess.
Also, I was able to rotate the LNB in its bracket (as you do when using the bare LNB) to about 15 degrees for my location, and I got the few dB of extra SNR I expected. I had read some places you have to rotate the entire dish… maybe true for LNBs that cannot be rotated. This simplifies dish installation even further, not having to rotate the dish.
If interested in the parts I used:
dish: google 264155964386
bracket: google 361912323862