Trial Run Results for Three Types of Whip Antennas

AnirbanSen

Member
The map is now working :)
Earlier it was showing as Forbidden!

See the attached graph. Also, compare with the early morning when the antenna was on the roof with 360 view. The stick antenna picked up tracks more than 100nm away. I reckon the visual horizon is about 8 Km from the roof with no tall building above 10 degrees elevation.

Also, after running in Beast mode, it seems to be capturing more planes. Not sure.
 

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wiedehopf

Member
Beast mode is just the fr24feed setting for where it gets the data.
Now dump1090 is running independently of fr24feed and the version is newer but that shouldn't really affect reception.

Good luck again with the antennas, software seems to be working now.
(very easy to add pfclient or piaware now that dump1090-fa is running)
 

AnirbanSen

Member
Good idea! You read my mind about the other clients. Since I have come this far and building the antenna depends on parts being shipped, might as well start adding services.

Any Process Arguments for the fr24 settings .ini file that can be put into better use?

Also, how long does the Collectd and RRD data for the ADS-B stay on the SD card? I won't kill my space, will it? (On a 32GB SD)


I plan to also add AirNav Radarbox and ADSB Exchange.

Let see where I can find the current links
 

AnirbanSen

Member
I'm also using remote.it so I can set up a TCP port to view from outside.
(My network blocks port so port forwarding in router doesn't work.)
 

wiedehopf

Member
You can change the lighttpd server port, then everything will be on another port.

You can also only change graphs1090 to another port check the lighttpd configuration.
 

wiedehopf

Member
Planefinder is $6.99 for data sharersand everyone alike?
Are you talking about the app or website?

Don't have ads on website as i feed or at least i think that's why.

It's written somewhere that you can get a free app if you're a feeder, you need to contact planefinder though.
Don't remember where it's written.
 

AnirbanSen

Member
The Android App. Will dig that up.

In the meantine, I joined the RG6 with the 2 inches of RG 176. Used both insulation tape and aluminum foil over the joint centre lead.

Take a look.
 

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wiedehopf

Member
That's a very impressive signal level!

You could probably reduce the gain from -10 (automatic gain, in practice for ADS-B equivalent to a gain of 55).
Try 49 and see how it works.
 

AnirbanSen

Member
That's a very impressive signal level!

You could probably reduce the gain from -10 (automatic gain, in practice for ADS-B equivalent to a gain of 55).
Try 49 and see how it works.
Also, I briefly received Mode AC packets which then stopped completely. I received about 10-12KBps in Received bandwidth when I set this up. But the last bit of wire squeezes into the room through an iron frame window and may be some signal is lost there. I have to keep it closed because of my cat who has been very curious with the spider antenna.
 

ab cd

Senior Member
So as I suspected, the bad joint between RG6 and RG176 was the reason. Did the video I posted was of any help?
 

AnirbanSen

Member
So as I suspected, the bad joint from RG6 to RG176 was the reason. Did the video I posted was of any help?
Yes it did. Thank you very much for that. I recalled the higher degree of signal loss in higher frequencies. So instead of joining as I would in cable tv joints, I proceeded to join and try to recreate the shielding. Also, I believe since the RG176 had a higher degree of signal loss, it is effectively reduced to 2-3 inches in length.

The antenna is now on the 6.5th floor. The RG6 is a 7m wire now. I'll likely need about 25-30m if it were to reach the roof. In view of the present signal level, would you recommend both the in line amplifier AND the 1090 BPF?
 

wiedehopf

Member
With 30 m of cable you absolutely need an LNA. Would still recommend the filtered rtl-sdr LNA or if that is too expensive look for a dual stage LNA with two SAW filters (maybe you find one on aliexpress).


Anyway, you can change the gain in

sudo nano /etc/default/dump1090-fa

(save/exit as before)
and then restart dump1090-fa with

sudo systemctl restart dump1090-fa
 

ab cd

Senior Member
Yes, with 30m cable definitely an LNA is required.

The requirement of filter depends on the strength of mobile/cell signal at your location.
 
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