Dear Zahidul Bhai
Hope doing absolutely fine. I need to get some advice to extend my coverage. I am using ADS-B receiver but coverage is too small competing with other ADS-B receiver. Plz get me you Email so that we can have a chat.
Regards
Md.Maynul Haque
Dear Maynul bhai,
Hope you are doing fine. As per my experience coverage depends on some matter like
#Free open area,
#Shorter length of antenna cable.
#Good quality RF cable & connector.
#Appropriate 1090mhz antenna.
#Low noise high gain ADSB modem.
Etc.
I am not sure about your problems but I will be happy to help you to give you antenna, cable, modem etc. You can reach me at GP 12540076 email zahidulhasa@gmail.com. Or you can give your contact number or e-mail I’d to cooperate directly.
Zahidul Hasan.
First post here. Awesome thread, lots of very smart people!
I had an RPI3 kicking around so putting it to work for Flightaware seemed logical. Super easy to set up.
Tried the factory antenna with the USB dongle which worked… but not great, and -30C I don’t feel like running cable outside.
Then tried an old cell phone antenna with about 30ft of cable (LMR195, I didn’t want to cut since I can use it elsewhere if not working here). Had to shorten the antenna just a bit to match the 1050±MHz. Works much better even with the longer feedline, and positioned it close to a window. Range was around 150NM or so in the window’s direction, west in my case.
Then this am I realized I still have an unused 2.4GHz vertical up on my tower about 60’ up with LMR-400 running into the shack. I connected to this and get an extra 100nm almost 360deg. Much better signals and I can see aircraft landing/taking off within 500’ of the ground at CYWG about 40mi away.
Ordered an ADS-B antenna from Amazon so after it arrives I’ll switch out the 2.4GHz antenna with the new one when it’s warm enough to do some climbing… Hope to see some improvement with a proper antenna.
Best of the season to everyone! 
New Flightaware antenna and band pass filter arrived a few days ago, Just installed the filter, looks like similar signals as before, attenuation is minimal so far. I do have cell towers within a couple of miles and my own ham radio transmitters going so I am hoping for more consistant reception.
Warmer weather in the forcast, might get onto the tower later in the week to install the new antenna.
You can test now how strongly the 2.4 Ghz antenna picks the Cell signal
(1) Without Filter
and
(2) With Filter
Comparing above 2 test scans will show you how effective is the filter.
When the Flightaware antenna is installed, you can test again.
The method to test is given here:
.
I’ll try to do that this evening. However I can’t really connect a monitor to the Pi where the antenna cable connects. Can I telnet or otherwise remote into the unit?
If you want remote access from a Mac or Linux Computer, then it can be done by opening the terminal and typing:
ssh pi@192.168.0.21
#Replace 192.168.0.21 by local IP of your PI
If you are using Windows Computer, download and install SSH client PuTTY from link below.
Once PuTTY is installed, you can remote control Pi by SSH.
https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
Had to name the ssh file under ./boot in orde for the SSH to work.
I am attempting to attach the two scan files, scan 1 with filter, scan2 without. Quite a difference at the lower portion of the band so the filter certainly does it’s job. Note the de-sense in scan2 right across the band!
Thank you for your guidence @abcd567 from YYZ!
Just replaced the 2.4g wifi antenna with the ADS-B antenna. Temps close to thawing and light winds, perfect tower weather Had some issues mounting the antenna on the 1.5" mast but managed to bend the U-bolts and make it fit. Not fun to do 50’ up but once tied in it’s not too bad. Needed a nice hot coffee after getting back on the ground though.
Getting approx 25-35% more positions from just counting results compared to previous day, but it’s a Saturday… It IS working better though for sure.
I know someone who has a TDR, will borrow it soon and measure impedance, SWR, etc. I like to sweep the feedline/antenna so I have a baseline for future checking.
-G.
Awesome. I’d love to put one outside my apartment. Have to check with the manager. I live about 1200 ft. from RW23 at KDSM. Very creative.
