Perhaps a balun would improve reception of satellites that don't pass so closely. For overhead passes the antenna seems to work fairly well as-is. My antenna doesn't have a balun and I've not decided if I'm going to add one yet. These are jammed into terminal blocks and attached to the coax feed line using the instructions on this site:
So I've just twisted the center and braid together on both ends of the two coax cables making up the antennas elements. First template had 15mm holes in the middle, second template had 15mm holes in the top and bottom.įor wiring it all up, the antennas elements don't need to be coax or to even have multiple conductors - if I had some thick copper wire lying around I would have just used that instead. First one was with the default values and second one I set my conductor diameter to 15mm (the diameter of my horizontal support pipes). I don't know how the instructables guy overcame this but I ended up just printing off the cutting template twice. The cutting templates generated by that website have small holes at the top and bottom with only large holes for the support pipes in the middle. So I'm using support pipes at the top and bottom as well (which the coax runs through, seems to be a fairly common approach). The template it generates is intended for using copper pipe or some other fairly solid wire as the antennas elements where as I'm using fairly flexible coax. I just used the default settings at the top of the page with the pipe diameters set further down for the cutting template. The cutting template was generated by this website: Friction is holding it together fairly well for now so later I might just add some hot glue so things cant easily be bumped out of alignment. I've also not used PVC glue either - mainly so I could adjust it while testing.
Main construction difference from those steps (aside from different size pipes) is the outer and inner elements are aligned at the top (as in the cutting template) rather than the middle (like in those instructions). The antenna wasn't constructed very accurately (a drill press and a miter saw would have helped) but it doesn't seem to matter too much if you're off by a few mm.įor building the antenna, I partially considered these instructions: It probably took me a bit over a day all up. The hard part was building the antenna with the bulk of my time spent messing with the drill templates and measuring/drilling/cutting the PVC pipes. It looks like a lot but really it was quite easy.
#WXTOIMG UPGRADE OMN RASPBERRY PI INSTALL#
Sudo apt-get install -y cmake gnuradio-dev gr-osmosdr qt5-default libqt5svg5-dev libpulse-devįinally, use the gqrx command to start Gqrx.Ok, here follows some quick notes about doing this.
#WXTOIMG UPGRADE OMN RASPBERRY PI UPDATE#
If you’re comfortable building software from source, and would like to have the very latest version of Gqrx, run the following commands: sudo apt-get update After installation, Gqrx will be available in the Internet section of the Applications menu. To install Gqrx from the Raspberry Pi software repository, open the Applications menu, select Preferences → Add / Remove Software, and search for Gqrx.
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