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Improve AM reception - ATC listening

Posted: Tue Mar 19, 2019 9:03 am
by Librentez
Hi !

First time on this forum ! I'm working on ATC listening project and I'm a bit struggling with quality !

Here is a GQRX screenshot :
Image

Here is an output sample :
https://youtu.be/OfwCS7rsUrs

Is there a way to improve the quality ? Antenna, settings... ? Any ideas are welcome !

I'm using a RTL-SDR cheap dongle with the AM/FM antenna on my roof.
Listening VHF marine traffic is achieve with a great quality.

Thanks,

Ronan

Re: Improve AM reception - ATC listening

Posted: Tue Mar 19, 2019 12:16 pm
by JEL
I would suggest you try SDR# and see if you can get better results there.

Perhaps it won't make a difference with your dongle, but with the AirspyR2 the choice of software CAN make a big difference.

I personally get much better aviation-reception with SDR# than SDRangel.
I'm not sure why that is, but I suspect it has to do with how SDRangel controls the hardware (such as amplifiers etc)

Perhaps you might get similar differences even though you use a different dongle (they ARE called SDR's after all ;) )

If passing aircraft (aircraft relatively close to you and/or at high altitudes) are loud with your current software and setup, then there is probably not much you can do.
Ground-stations are usually harder to pick up than aircraft at altitude.

Re: Improve AM reception - ATC listening

Posted: Wed Mar 20, 2019 10:45 am
by rtlsdrblog
Build a proper antenna. Either a dipole or quarter wave ground plane sized for the airband.

Size calculators:

https://www.everythingrf.com/rf-calcula ... calculator

https://m0ukd.com/calculators/quarter-w ... alculator/