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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Fri Feb 26, 2016 6:16 am 
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lankosher - FlightAware user avatar

Joined: Sun Dec 14, 2014 8:53 am
Posts: 25
GeorgLichtblau wrote:
antonov124 wrote:
TomMuc wrote:
the flightaware filter over here in europe does not really make sense as it let pass 920-960mhz (cellphone) nearly 100%.

It would be interesting if someone has bought here from Germany this filter and can report whether he brings works well with our neighboring frequencies or only cons


I can't agree to TomMuc.. Ordered it via Amazon in Austria (not Germany :) and I don't know where it come from :)).. I got an improvement in urban area (Vienna, we got the same frequencies). ~€20 Euro is worth a try IMHO.


I agree, I live in urban area, heart of Krakow where electromagnetic junk is really high and I noticed significant difference after I had applied FA filter.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Fri Feb 26, 2016 8:59 am 
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antonov124 - FlightAware user avatar

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sounds good ;)


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Mon Mar 07, 2016 6:09 pm 
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onurtogac - FlightAware user avatar

Joined: Sat Mar 05, 2016 11:52 am
Posts: 1
I'm newbie ads-b user and I will try ads-b filter.Thx for a lot of information.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Wed Mar 09, 2016 2:30 pm 
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ssokol1971 - FlightAware user avatar

Joined: Sun Jan 03, 2016 2:50 pm
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Any chance the next batch of these could be tweaked to officially include 978 MHz? Has anyone done any serious testing (perhaps near a UAT tower) to see if the current filter helps, hurts, or makes no difference.

Thanks!

Steve


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Sat Mar 12, 2016 8:49 am 
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dbaker - FlightAware user avatar

Joined: Mon Jul 25, 2005 12:00 am
Posts: 2838
Location: FlightAware WHQ
ssokol1971 wrote:
Any chance the next batch of these could be tweaked to officially include 978 MHz? Has anyone done any serious testing (perhaps near a UAT tower) to see if the current filter helps, hurts, or makes no difference.

Thanks!

Steve


Hi Steve, we'll keep that in mind for the future, but just to set expectations, we've already produced inventory through most of this year, so it might be a while. If distribution increases, we might start to look at it sooner. Daniel


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Sat Mar 12, 2016 10:32 am 
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caius - FlightAware user avatar

Joined: Sat Mar 07, 2015 4:51 pm
Posts: 249
ssokol1971 wrote:
Any chance the next batch of these could be tweaked to officially include 978 MHz? Has anyone done any serious testing (perhaps near a UAT tower) to see if the current filter helps, hurts, or makes no difference.

Thanks!

Steve


It's probably wide enough already. Here is a scan I did with the filter in line that shows mobile phone transmitters at 950 MHz.

Image

I don't know how much attenuation there is at that frequency, but it didn't look like there was much. UAT is not used in Europe so I can't test it receiving that unfortunately.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 07, 2016 2:27 am 
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cynd - FlightAware user avatar

Joined: Sun Feb 21, 2016 7:40 am
Posts: 20
Did i miss something or why is the filter listed as unavailable on amazon in germany?
When will it come in stock again?


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 07, 2016 7:20 am 
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dbaker - FlightAware user avatar

Joined: Mon Jul 25, 2005 12:00 am
Posts: 2838
Location: FlightAware WHQ
cynd wrote:
Did i miss something or why is the filter listed as unavailable on amazon in germany?
When will it come in stock again?


Apologies for that -- we ran out due to a surge in demand. We shipped 500 more to Amazon last week and expect them to be back in stock any day now.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 07, 2016 7:24 am 
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cynd - FlightAware user avatar

Joined: Sun Feb 21, 2016 7:40 am
Posts: 20
dbaker wrote:
cynd wrote:
Did i miss something or why is the filter listed as unavailable on amazon in germany?
When will it come in stock again?


Apologies for that -- we ran out due to a surge in demand. We shipped 500 more to Amazon last week and expect them to be back in stock any day now.


No prob, just wanted to order my prostick + filter and noticed the filters aren't available anymore :)


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 07, 2016 7:29 am 
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dbaker - FlightAware user avatar

Joined: Mon Jul 25, 2005 12:00 am
Posts: 2838
Location: FlightAware WHQ
cynd wrote:
dbaker wrote:
cynd wrote:
Did i miss something or why is the filter listed as unavailable on amazon in germany?
When will it come in stock again?


Apologies for that -- we ran out due to a surge in demand. We shipped 500 more to Amazon last week and expect them to be back in stock any day now.


No prob, just wanted to order my prostick + filter and noticed the filters aren't available anymore :)


While you wait a few days, it might be interesting to try implementing one at a time to compare stats (old dongle, new dongle, new dongle w/ filter)


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 07, 2016 7:50 am 
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cynd - FlightAware user avatar

Joined: Sun Feb 21, 2016 7:40 am
Posts: 20
dbaker wrote:
cynd wrote:
dbaker wrote:
Apologies for that -- we ran out due to a surge in demand. We shipped 500 more to Amazon last week and expect them to be back in stock any day now.


No prob, just wanted to order my prostick + filter and noticed the filters aren't available anymore :)


While you wait a few days, it might be interesting to try implementing one at a time to compare stats (old dongle, new dongle, new dongle w/ filter)


Great idea, i'll do that and let you know!


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 14, 2016 12:56 am 
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cynd - FlightAware user avatar

Joined: Sun Feb 21, 2016 7:40 am
Posts: 20
Still not available, any news on this?


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu Apr 14, 2016 5:59 pm 
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dbaker - FlightAware user avatar

Joined: Mon Jul 25, 2005 12:00 am
Posts: 2838
Location: FlightAware WHQ
cynd wrote:
Still not available, any news on this?


We are shipping to Amazon today and expect it to be available next week.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Mon Apr 25, 2016 1:10 am 
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cynd - FlightAware user avatar

Joined: Sun Feb 21, 2016 7:40 am
Posts: 20
Are there any recommendation for the gain setup?
Especially in combination with the pro stick?


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Mon Apr 25, 2016 6:58 am 
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dbaker - FlightAware user avatar

Joined: Mon Jul 25, 2005 12:00 am
Posts: 2838
Location: FlightAware WHQ
cynd wrote:
Are there any recommendation for the gain setup?
Especially in combination with the pro stick?


Max gain is probably OK for pro stick + filter.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Mon Apr 25, 2016 12:47 pm 
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abcd567 - FlightAware user avatar

Joined: Sat Feb 15, 2014 3:08 am
Posts: 1929
Location: Toronto CYYZ
cynd wrote:
Are there any recommendation for the gain setup?
Especially in combination with the pro stick?

I tried pro stick WITHOUT filter, and found that if I set dump1090 more than 35 dB, performance drops sharply. To keep low the signals which are >-3 dBFS, I am using gain setting of 30 dB.

I have heared that with FA filter, much higher gain settings can be used. I am goig to order the Filter, and after I receive and use it, will post the results.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Mon Apr 25, 2016 6:13 pm 
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ibetaxed - FlightAware user avatar

Joined: Wed Mar 30, 2016 4:04 pm
Posts: 8
Hi FA,

Just wanted to offer some feedback on my most recent Amazon order...

Late Friday night I ordered my second FA filter and Pro Stick through Amazon Prime, along with a couple of short USB cables. The Pro Stick is supposed to be here Friday, but the package with my first three items arrived though UPS today. There weren't any obvious signs of damage to the package but when I opened it I found just the empty plastic bag that the filter should have been in. The FA card was still stapled to it but the seam on the side of the bag was split open.

After much searching on the Amazon site I couldn't find anything that seemed to address the possibility that an item might be missing from their package, so I chose to return the item and selected "Missing parts or accessories" from the Return Reason drop-down. I've printed out their return label and I'll be sending back the empty baggie as my "return" for credit.

The "box" they sent these three items in wasn't much more than a sheet of cardboard that's been folded over into a rather flat box shape. I suspect that if the filter even made it into the box it could have wriggled out a gap in the box's sides once it was loose from the bag. This would be less likely a possibility if the bag were sturdy enough that the filter couldn't get out.

I expect this will get cleared up eventually with Amazon. In the mean time the Pro Stick won't be much use to me when it arrives Friday without the filter, so I guess I'll be ordering another one.

Thanks,
John


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Fri Apr 29, 2016 5:02 am 
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andrew6721 - FlightAware user avatar

Joined: Sun May 10, 2015 5:06 am
Posts: 69
Location: Sydney, Australia
.... and so the waiting begins....

Just ordered two filters via the wifi_expert on ebay, as thats the only way to get them here to Australia.

All up US$62 (about AU$86 allowing for PayPals crappy exchange rate) deliver. ETA about May 20.

Will be interesting to see if they make any difference considering the rapid rollout of 4G & 4GX services in Australia at the moment.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Sun May 01, 2016 6:33 pm 
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41south - FlightAware user avatar

Joined: Mon Oct 11, 2010 10:00 am
Posts: 46
andrew6721 wrote:
.... and so the waiting begins....

Just ordered two filters via the wifi_expert on ebay, as thats the only way to get them here to Australia.

All up US$62 (about AU$86 allowing for PayPals crappy exchange rate) deliver. ETA about May 20.

Will be interesting to see if they make any difference considering the rapid rollout of 4G & 4GX services in Australia at the moment.


They shipped really fast to NZ - circa 5 days. The filter certainly helps here. It's still a good price for a pretty good filter by all accounts. There is a Mini-circuits equivalent filter which is smaller and much lighter, but also more expensive.


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Sun May 01, 2016 6:47 pm 
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jonhawkes2030 - FlightAware user avatar

Joined: Tue Jan 05, 2016 4:15 pm
Posts: 1054
Location: NYC
There is a really good cavity filter from the guys that made the Mode S Beast
http://shop.jetvision.de/epages/6480790 ... ucts/71010

It is 89.25 € so isn't cheap, but it has less loss and a much narrower bandwidth.
It may be useful if your site is near a radar transmitter(1030Mhz) or DME.


There stats:-
Passband Attenuation: 0.5 dB
-3 dB Bandwidth: better than 9 MHz
-10 dB at 25MHz


Last edited by jonhawkes2030 on Thu May 05, 2016 6:28 am, edited 1 time in total.

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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Thu May 05, 2016 1:56 am 
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andrew6721 - FlightAware user avatar

Joined: Sun May 10, 2015 5:06 am
Posts: 69
Location: Sydney, Australia
41south wrote:
They shipped really fast to NZ - circa 5 days. The filter certainly helps here. It's still a good price for a pretty good filter by all accounts. There is a Mini-circuits equivalent filter which is smaller and much lighter, but also more expensive.


Well the filters turned up today :D

Have just installed one of them - will be interesting to see if they make any difference.


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 Post subject:
PostPosted: Mon May 23, 2016 1:10 am 
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WhiteCitadel - FlightAware user avatar

Joined: Tue Nov 17, 2015 10:36 am
Posts: 14
Did you get much of a difference? I am still running without a filter, only put the fa antenna in recently so so optimising that but I am curious what the filter might bring.


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 Post subject: Re:
PostPosted: Mon May 23, 2016 6:36 am 
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andrew6721 - FlightAware user avatar

Joined: Sun May 10, 2015 5:06 am
Posts: 69
Location: Sydney, Australia
WhiteCitadel wrote:
Did you get much of a difference? I am still running without a filter, only put the fa antenna in recently so so optimising that but I am curious what the filter might bring.


Not much at all if any........ any insertion loss would appear to have been recovered by the fact I have the gain set to AGC in the DVB-T stick. I mustn't have much other interference at the moment - I thought some of the 4G-LTE frequencies used by the mobile phone carriers here in Australia may have caused some issue.

Next step is to buy a Pro-Stick ..... :D


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Fri Jul 15, 2016 2:07 am 
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takenek - FlightAware user avatar

Joined: Fri Jul 15, 2016 1:49 am
Posts: 3
Hello Guys,
I just buy a filter and i connect to my ADS-B instalation but don`t know why there is no range increase - there is no diff between with/without filter.
I use Raspberry with Raspian.

There is any software where i can check this filter working properly?
Mayby this is a fake - i buy this filter on e-bay from someone because FlightAware don`t send to my country :-(

Best Regards
TaKeN


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 Post subject: Re: FlightAware ADS-B filters now for sale worldwide
PostPosted: Fri Jul 15, 2016 6:04 am 
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obj - FlightAware user avatar

Joined: Tue Sep 30, 2014 7:14 pm
Posts: 3323
You will only see an improvement with a filter if you have strongly interfering signals nearby.
Maybe in your area there's just not any strong interference, so the filter does nothing but add a bit of loss.


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