best antenna

[magnum]

Sure, here we go. The screenshot of the map was taken yesterday at approx 3:30pm my time with plenty of traffic.
The chart is showing the last 24 hours.

I'm already at my geographical maximum based on heywhatsthat.com, so there seem to be not much room for improvement.
Forget about the way i mounted the antenna, this was for testing only, i'm currently checking a better and more reliable socket

The message rate of around 1200/sec is also the maximum which can be expected from that type of stick. For more you will need a different equipment (e.g. Airspy)
I did not adjust the antenna, this was made by the seller (eBay) with additional equipment for measurement.

You see the little aircraft at Munich in the lower right corner? It's 330 km away.

Skyview-new-antenna.jpg
last24-hours.jpg
new-antenna.jpg

[AlejandroM]

wow, can you send us a picture of the dump1090 map, and what kind of antenna did you do?

and how do you adjusted it?

thanks

[magnum]

I just bought an antenna after some DIY attempts.

It's not an original Antenna, but built by an enthusiast and adjusted electronically to exactly the required frequency.
Slightly better than my DIY versions and in a waterproof outdoor tube.

Range went up 10-20 NM and aircraft getting closer to the airport are seen "longer" before they disappear due to their altitude.

peak numbers today:
aircraft: 150
Messages: 1250/sec
gain: 49.6

I will try a little lower gain to verify if it improves.

So far i am satisfied especially with the antenna only indoor.

[AlejandroM]

today is a good day =)

Aircraft (total): 57
(with positions): 47
Messages: 191.4/sec

gain is on 45

[AlejandroM]

yes, i have already purchased that one, maybe it will arrive on weekend.

thank you abcd567

[abcd567]

Flightaware ProStick Plus at Amazon . com

https://www.amazon.com/dp/B01M7REJJW/

[AlejandroM]

great, you teach us to test, and i will test anything! =)

do you think this will help?

https://www.ebay.com/itm/AT-T-Formerly-21-Volt-Power-Inserter-for-All-DIRECTV-SWM-LNBs-PI21-audio/312733318908?epid=17009468449&hash=item48d05bbefc:g:V1kAAOSwT8FdViVS

i buy one but i didnt see it was 5Mhz - 1000Mhz, so for Planes doesnt work, i will use it on my AIS Raspberry to see if that works ( 162Mhz )

[abcd567]

If you use Flightaware blue dongle, you will not need a satellite amplifier (unless your coax cable is too long).

[AlejandroM]

i will test dipole antena with blue flighaware dongle, the one that has the filter, and the in line amp.

if you see one at ebay, just send me the link =)

i really appreciate all the info you post, this is why i did it, because you explain it so good, and the images.

thanks!

[abcd567]

As with dipole you are using dvbt (no integral amplifier), better add a Satellite amplifier close to the antenna. You will need a power inserter and a 15V DC power supply also.

[AlejandroM]

well, a small update from my antennas.

i raised the cantenna i think are 5meters above floor, and it works good

antenna01.png

config is raspberry pi 3 b + flightaware yellow +flightaware filter and cantenna.

my other antenna is the 2 pole like abcd567 did some time ago, here is the pic.

antenna03.jpg

and this is the data i am receiving:
nld2.png

a few planes but some are far away, setup is

raspberry pi 3 b + dvb-t dongle + and mcx extension to 2 pole antenna as shown in picture ( no filter ) next week filter will arrive and i have to test that config.

funny thing, on this config i saw a plane with afghanistan flag, but culdnt take a screen shot to find more about it. since radar is in Mexico, it was weird.

[AlejandroM]

great, i will test.

btw what means the F and the T in front of station?

mines are T-

but why?

[abcd567]

Try different gain value, like 49 45 40, 35 etc, and at each value observe message rate / number of planes to find best setting.

Alternatuvely wiedehopf has developed some script to do this tweaking of gain.

[AlejandroM]

thanks, as i remember in all my configs are:

# RTLSDR gain in dB.
# If set to "max" (the default) the maximum supported gain is used.
# If set to "agc", the tuner AGC is used to set the gain.
GAIN="max"

so, is this good?

[abcd567]

The EB_VERSION is same as mutability ver 1.15~dev.
It is a built package maintained in Debian Buster repository by Debian hamradio maintener. It is a snapshot of source code of dump1090-mutability ver 1.15 ~dev.

Dump1090-mutability ver 1.15~dev package now available in Repository!


https://bugs.debian.org/cgi-bin/pkgr...090-mutability


To change gain:

sudo dpkg-reconfigure dump1090-mutability

sudo nano /etc/default/dump1090-mutability