Rf amp yes or no ?

[Col@home]

Wiedehopf
Thanks for your help and also for creating tar1090 I love the radar view and im sure the graphs will make more sense to me when i learn a little more about db and dbfs.
in the mean time do my graphs look like a cavity filter would be of any use to me?

thanks
colin

[Col@home]

Arr that makes sense then so everything for my radar looks good then.

[wiedehopf]

You've set it to 30000 meters as you switched to metric.

The site doesn't seem to recalculate the 'up in the air' immediately when switching US / Metric but if you click the 'up in the air' button twice it will update to the changed units.

[Col@home]

This is strange as @30000 it shows me more distance see my screen shot.

Screenshot_20241115_121311_Edge.jpg

[wiedehopf]

I'm not sure where you get the 350 nmi from, that's just incorrect.
The panorama you linked suggests a range of roughly 270 miles which is 234 nmi.
This agrees nicely with the numbers in graphs1090 (fr24 reported max range isn't useful in my opinion).


The blue heywhatsthat outline in your tar1090 screenshots looks exactly like it should by the way.

image.png

[Col@home]

I have the pihut 60cm ads-b Antenor @ 6mtr my co-ordinance are 51.902075 -1.164765 with an elevation of 84mtr above sea level, 5mtr rj58 coax connected to ADS-B Active SAW Filter&LNA SMA Connectors Low Noise Amplifier 21dB and NooElec NESDR Mini (TV28T v2) USB RTL-SDR, DVB-T & ADS-B Receiver, my radar is T-EGUA71 and my panorama is https://www.heywhatsthat.com/?view=MQWV268F
I currently receive 2,000 messages per second and max range of 250nm with average of 213nm, heywatsthatt says I should get around 600km or 340nm.also after installing tar1090 my fr24 feeder changed from default dvbt to mode s beast it also has this setting --net --gain -10 --lat 51.9017 --lon -1.1643 hopefully that is correct.
Im not at all interested in ranking, but if heywatsthatt is accurate and I should be able to see an aircraft at 30,000 ft 350nm away I would like to do my best to receive that.
I have 3 mobile phone masts within 0.6km of my location, I was hoping from the graphs above someone could tell me if my reception, signal and noise are good or bad and what my best option is.
Thank you
Colin

[wiedehopf]

Are you sure about your heywhatsthat?
The blue circle might just be correct after all.

What exact parts are you using currently?

If you're min maxing, uputronics filtered LNA + airspy mini is a good setup.
Add one either a 5 or 8 vinnant antenna and you should get pretty much all you can get.
If there is strong interference you'll also need a cavity filter.

[Col@home]

by the way please ignore the blue circle on tar1090 was a mistake.

[Col@home]

hi guys I have been running tar1090 to get graphs now i have the pi hut 60cm up now with its base at 8mtr and running the saw amp as before my Rader number is T-EGUA71 on FR24 and heywatsthat I am getting around 220 nm average with 140 max if you look at haywats this i should be getting 350 nm, the gain on the tar1090 graph was set using the auto gain with tar1090.
if somebody who know what the graphs mean can tell me any thing they see that maybe the reason for the nm shortfall I would really be grateful, and will the cavity filter make that much difference and what are the cavity filters that are just a board with gaps ?
1.jpg2.jpg3.jpg4.jpg

[abcd567]

G4LOH

Our objectives are different.

Your objective is Rolls Royce, Bentley, Jaguar, and Aston Martin
My objective is Ford, Kia, Nissan, and Volkswagon

[G4LOH]

The OP asked about "an LNA to improve his range". I assumed from this that he wanted to get the best possible range at his location which is, primarily, a hardware question.

To get the best range at any location relies on having the best possible antenna and LNA hardware.

No software can ever compensate for imperfect performance of the hardware.

The DVB-T dongles have quite poor performance as weak signal receivers, they have high "Noise Figure" and are extremely vulnerable to strong local signals which most users are never even aware of.

The Noise Figure may be improved with an LNA but very often, adding an LNA exacerbates the strong signal handling problem.

Many of the add-on parts on Ebay will actually make the performance worse. I haven't seen anything on there that might actually optimise the range for anyone.

Col@home, looking at your Heywhatsthat profile you have a pretty good radio location with your radio horizon being < 0.5 degrees in all directions.

A radio horizon of 0.5 degrees will limit the range a little but I would expect 250nm would still be possible. Here I have a radio horizon of 1.2degrees to the North-East and my range never exceeds 220nm in that direction as a result.

Tim

[abcd567]

I'm a bit confused about what you're trying to achieve range-wise.

Are you looking to climb the FR24 data sharer leader board? https://www.flightradar24.com/share-statistics

Perhaps you might tell me your radar name (and enable data sharing if not already done so?) There will be some clues in that data which will help work out what is happening.

Mine is T-EGHK-8 in the Country GBR listing

Cheers

Tim

It is not clear from your post if it is addressed to me (abcd567) or Col@home

As far as I am concerned, competition is not at all my objective. The last I looked at "FR24 data sharer leader board" was about 5 years ago.

My objective is, and always was, to reach a low-cost harware-software solution to get a good performance at a cost affordable to most hobbyists.

[G4LOH]

I'm a bit confused about what you're trying to achieve range-wise.

Are you looking to climb the FR24 data sharer leader board? https://www.flightradar24.com/share-statistics

Perhaps you might tell me your radar name (and enable data sharing if not already done so?) There will be some clues in that data which will help work out what is happening.

Mine is T-EGHK-8 in the Country GBR listing

Cheers

Tim

[abcd567]

What is your equipment with which achieved such a good performance?

I could achieve following range with indoor mag-mount antenna and low-cost LNA+SAW filter (photos attached below)

Max Range = 280 nm
Average Range = 200 nm

dump1090-localhost-range-24h-1.png



Filtered LNA DVB-T RPi.jpgmag-mount whip antenna 1090 mhz.png





.

[Col@home]

sorry guys you may notice I have just deleted some posts.
I have just run heywatsthat on my pc and not mobile and have been given some completely different distances and it would appear 220nm is my max so it would seem all is good but thanks for your help.
https://www.heywhatsthat.com/?view=A613BRW7

Colin
1090.png