Originally posted by Birdie
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Originally posted by VK6UFO View PostI can see the moon at night. Pretty sure that's more than 600 km away. 'Line of sight' distance increases significantly with height.
Hope this answers most of the questions Newbies having been asking.F-WSSS1 - Cats refused to Pee & Pooh on RadarBox - Running a FR24 Receiver & DVB-T Dongle 24/7 to piss off The Chief Thief.
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Originally posted by Even92LN View PostThe lenght of the cable has nothing to do with the antennas frequency range. But the longer cable you have, the more signal loss.
Here's the example from an H155 coaxial:
10 MHz: 3.0 dB/100m
50 MHz: 6.5 dB/100m
100 MHz: 9.3 dB/100m
230 MHz: 14.2 dB/100m
300 MHz: 16.3 dB/100m
400 MHz: 19.0 dB/100m
470 MHz: 20.7 dB/100m
860 MHz: 28.5 dB/100m
1000 MHz: 30.9 dB/100m
1350 MHz: 36.4 dB/100m
1750 MHz: 41.9 dB/100m
2050 MHz: 45.8 dB/100m
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Originally posted by VK6UFO View PostI can see the moon at night. Pretty sure that's more than 600 km away. 'Line of sight' distance increases significantly with height.
Maybe, FR24 should install a Flightradar24 Receiver on the Moon. I am sure we will have all corners of the earth properly and uniquely covered.F-WSSS1 - Cats refused to Pee & Pooh on RadarBox - Running a FR24 Receiver & DVB-T Dongle 24/7 to piss off The Chief Thief.
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Originally posted by Jarod View PostThere may not be a best antenna, but there is a best looking antenna.
http://x264.nl/dump/ads-b-antenna-gr...ane-proper.jpg
But seriously, all kidding aside, this GP really works well, today i broke my own record:
http://x264.nl/dump/rtlsdr-mini-virt...1.1-record.jpg
Parts used:
BNC Chasis part.
Copper electrical wire, each piece 6.54cm long.
This looks an amazing GP and tracking well in excess of 380nm. 2 Questions if I may?
1: What did you mount your GP onto?
2: How high off the ground was it to obtain those nm's?
Just asking 'coz I'm gonna make one for myself.
You should patent it :-)T-EGBB16
Hardware: NooElec DVB-T2 Dongle, Raspi Pi2 Mod B, 6dB Collinear Antenna, Nevis Pre-Amp & 1090mhz SAW Filter, 9mtrs WF100 Cable and 28ft Mast.
Software: Rasbain Jessie Lite, FR24 Feeder, Dump1090mutab and VRS.
Stats for Mar 18, 2016. Uptime:100%. Aircraft seen:2,012. Positions Reported:486,817. Maximum Distance:243nm (Stats provided by FR24)
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After a good few hours of soldering and a fair amount of 1st degree burns to my fingers. I finally finished building the GP designed by Jarod.
Well, not entirely as Jarod built for a couple of reasons.
1: Fingers too sore from getting 1st degree burns from trying to hold copper wire in place whilst soldering.
2: Whilst the solder happily attached itself to the copper wiring, it would not stick to the Nickel Plated BNC Chassis.
Therefore, I built a variation of Jarod's design.
After hours of attempting to solder 9 lengths of copper wire, I instead only used 5.
1 for the upright centre section and 4 for the chassis bent round the screw holes with a bit of solder in place.
Whilst I did not gain the 380nm as Jarod did. I did however obtain 90nm with GP just at window height on ground floor of my house. Which was a lot better than the supplied antenna that comes with the dongle at the same height.
Also, when using 4 copper wires on the chassis, it does provide better range when put into horizontal position instead of the angle suggested by Jarod but remember, Jarod used 8 copper wires on the chassis and not 4 like I did :-)T-EGBB16
Hardware: NooElec DVB-T2 Dongle, Raspi Pi2 Mod B, 6dB Collinear Antenna, Nevis Pre-Amp & 1090mhz SAW Filter, 9mtrs WF100 Cable and 28ft Mast.
Software: Rasbain Jessie Lite, FR24 Feeder, Dump1090mutab and VRS.
Stats for Mar 18, 2016. Uptime:100%. Aircraft seen:2,012. Positions Reported:486,817. Maximum Distance:243nm (Stats provided by FR24)
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T-EGBB16
Hardware: NooElec DVB-T2 Dongle, Raspi Pi2 Mod B, 6dB Collinear Antenna, Nevis Pre-Amp & 1090mhz SAW Filter, 9mtrs WF100 Cable and 28ft Mast.
Software: Rasbain Jessie Lite, FR24 Feeder, Dump1090mutab and VRS.
Stats for Mar 18, 2016. Uptime:100%. Aircraft seen:2,012. Positions Reported:486,817. Maximum Distance:243nm (Stats provided by FR24)
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If you want solder to stick to the chassis part of the connector, try filing some of the plating off. That is usually enough. You should apply lots of heat from a good iron before starting to solder.. the body of the connector is like a heatsink.
If you have access to flux paste, even better.
Another option is to use some brass nuts, bolts and washers through the holes. You can screw the wires down or solder directly to the bolts.Rob, VK6UFO
F-YPPH3
o410E
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Thanks Rob,
Never thought of attempting to file off some of the plating. I'll give it another go at the weekend :-)T-EGBB16
Hardware: NooElec DVB-T2 Dongle, Raspi Pi2 Mod B, 6dB Collinear Antenna, Nevis Pre-Amp & 1090mhz SAW Filter, 9mtrs WF100 Cable and 28ft Mast.
Software: Rasbain Jessie Lite, FR24 Feeder, Dump1090mutab and VRS.
Stats for Mar 18, 2016. Uptime:100%. Aircraft seen:2,012. Positions Reported:486,817. Maximum Distance:243nm (Stats provided by FR24)
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Or wind with copper stranding and insert the rod into the centre of the winding and solder to it, so at least a large amount of surface is touched by the winding. (like in a transformer)
On my N-plate base like that I simply scratched a bit off and used the existing screw taps and put loops on the radials (they are mostly there for signal reflection anyway)Posts not to be taken as official support representation - Just a helpful uploader who tinkers
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We just received this antenna to our office and will perform some tests within the next weeks.
http://www.anteni.net/adsb/#!/~/prod...94&id=15504147
https://www.dropbox.com/s/2s97kyc9ul...2011.20.29.jpg
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Originally posted by Mike View PostWe just received this antenna to our office and will perform some tests within the next weeks.
http://www.anteni.net/adsb/#!/~/prod...94&id=15504147
https://www.dropbox.com/s/2s97kyc9ul...2011.20.29.jpg
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I guess it consists of 5 units of MS10910 Beam antenna 1090MHz.
Each antenna has a beam width of 60 Degree.
60 x 5 = 300 Degree.
Will it be really Omnidirectional 360 Degree coverage ?F-WSSS1 - Cats refused to Pee & Pooh on RadarBox - Running a FR24 Receiver & DVB-T Dongle 24/7 to piss off The Chief Thief.
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