Search found 60 matches

by GaryG
Wed Sep 23, 2015 3:08 am
Forum: General Discussion
Topic: Range Expectations
Replies: 11
Views: 3875

Re: Range Expectations

Hi With a gain antenna (your 12-element co-linear as an example), the closer you are to having the antenna point at the signal source, the lower the gain. When the plane is overhead, very little signal will be actually received. I think this is referred to as the donut effect, if it's right overhead...
by GaryG
Wed Feb 25, 2015 1:43 am
Forum: General Discussion
Topic: A problem with USB dongle data stoppage
Replies: 3
Views: 2068

Re: A problem with USB dongle data stoppage

A few thoughts... A longer USB cable being used? It sounds to me like it could be a power problem. Longer cable - more resistance - less power getting through. It could also be that the 'new' box doesn't supply quite as much power on the USB connector. It could be that the USB port might be going in...
by GaryG
Thu Oct 23, 2014 7:15 pm
Forum: Installation Problems
Topic: Problem getting mode-s data...
Replies: 8
Views: 4928

Re: Problem getting mode-s data...

Use Google to search for information. I used "dump1090 command line example" without the quotes and the search result showed some possible sources of information. One info source found is http://planeplotter.pbworks.com/w/page/79995023/Dump1090 dump1090 has some startup options when starting, "--gai...
by GaryG
Wed Oct 22, 2014 7:36 pm
Forum: Installation Problems
Topic: Problem getting mode-s data...
Replies: 8
Views: 4928

Re: Problem getting mode-s data...

I can understand the yawn! Three thoughts. - AGC - set it to -10 which will let dump1090 set the RTL to use the auto AGC setting. I forget the actual command syntax, it's on a different computer, Google should help. - antenna - clear view of the sky is needed, most solid objects will block or attenu...
by GaryG
Tue Sep 16, 2014 10:02 pm
Forum: General Discussion
Topic: New CHEAP LNA
Replies: 40
Views: 15323

Re: New CHEAP LNA

Hello Jon, Which side of the LNA? I found I had to put the LNA on the antenna side of the filter; if I put the LNA between the filter and the receiver (SBS-3) my range actually dropped quite a bit. My feeling is that there might be a lot of lower frequency 'noise' being output by the LNA that satura...
by GaryG
Sat Sep 06, 2014 11:10 pm
Forum: General Discussion
Topic: New CHEAP LNA
Replies: 40
Views: 15323

Re: New CHEAP LNA

A thought re the RTL not seeming to work problem. The LNA is a broadband amplifier and I am now thinking the gain at 1090 is not very high in comparison to lower frequencies. What you are describing and what I saw when I connected my LNA between the 1090 filter and my SBS-3, I'm now wondering if the...
by GaryG
Sat Aug 30, 2014 1:16 am
Forum: General Discussion
Topic: New CHEAP LNA
Replies: 40
Views: 15323

Re: New CHEAP LNA

Hi Received my LNA Wednesday. Setup is DPD roof mounted antenna to SBS-3 with the 3-pole filter at the SBS-3. I first tried between the filter and the SBS-3 but the results did not look promising. I tried that setup first as I thought amplified out of band 'stuff' might confuse things. I now have it...
by GaryG
Sun Aug 24, 2014 7:26 pm
Forum: General Discussion
Topic: Planes or in the list but not showing on the map?
Replies: 3
Views: 2049

Re: Planes or in the list but not showing on the map?

Almost all planes have/use Mode C as I am pretty sure it is a requirement for any controlled airspace. Mode S is still not a requirement everywhere, and many smaller and older aircraft are not equipped yet. Mode C only aircraft do show in the list without Lat/Lon and these are probably the ones you ...
by GaryG
Sat Jul 26, 2014 2:14 am
Forum: General Discussion
Topic: Maps Offline and other Newbie Topics
Replies: 4
Views: 4278

Re: Maps Offline and other Newbie Topics

Hello Daniel No Internet, I assume you are using a 1090MHz receiver of some type feeding VRS. Without Internet access, I can't think of an easy solution. At first, I was thinking PlanePlotter (free 30 day trial available) but you would have needed to have preloaded the maps of the area you would be ...
by GaryG
Fri Jul 04, 2014 7:44 pm
Forum: General Discussion
Topic: Suggested Amp (Read Cheap)
Replies: 15
Views: 7143

Re: Suggested Amp (Read Cheap)

Hi w7psk,

I've sent a private message, no need to clutter up the forum...

GaryG