Cheap filter experience?

[foxhunter]

Flightaware offers it’s own filter which is also only a little more expensive.
It can work, but it depends on several things.

Announcing the new 1090 MHz only bandpass filter!

FlightAware is excited to announce the availability of a 1090 MHz-only bandpass filter for the ADS-B community outside of North America. This is something many of you have asked for. The filter we’ve offered in the past wasn’t great at blocking GSM mobile phone interference that can be found outside of North America. This new filter is an economical bandpass filter option that provides better attenuation of 950 MHz GSM. Those of you building PiAware sites in urban areas or other areas with 950 M…

I would start reading the thread “Do I need a filter” with lots of information and tipps how to identify the need of a filter.

Do I Need A Filter?

The space around ADS-B antenna contain not only 1090 MHz signals, but also lot of other signals at different frequencies. The closer the frequency of a signal to 1090 MHz, your ADS-B antenna picks it stronger. For example if there are three signals of equal strength, one at 144 MHz, 2nd at 850 MHz and 3rd at 950 MHz, the ADS-B antenna will pick 950 MHz one the strongest, 850 MHz one a bit less stronger, and 144 MHz one much fainter. As the Cell/Mobile/Pager signals exist in the range 850 MHz to…